User:Iceblock/Oxford Dictionary of Astronomy/Red links
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A
[edit]- AAO -> Anglo-Australian Observatory
- [[]] -> American Astronomical Society
- [[]] -> Anglo-Australian Telescope
- [[]] -> American Association of Variable Star Observers
- Abell Catalogue
- Abell cluster
- Abell radius
- constant of aberration -> [[]]
- optical aberration
- aberration of starlight
- ablation age
- [[]] -> abundance of elements
- Acamar
- acceleration of free fall
- [[]] -> Advanced Composition Explorer
- Achernar
- A-class asteroid
- Acrux
- active optics
- active prominence
- active region
- John Couch Adams
- Walter Sydney Adams
- Adams Ring
- Adhara
- adiabatic process
- Adrastea (moon)
- [[]] -> Aitken Double Star Catalogue
- Advanced Composition Explorer
- advance of perihelion
- [[]] -> stony meteorite
- Ae star
- AGB star -> asymptotic giant branch star
- Agena -> Hadar -> [[]]
- AGILE
- AGK
- Ahnighito meteorite -> Cape York meteorite
- [[]] -> cosmic-ray shower
- George Biddell Airy
- Airy disk
- Robert Grant Aitken
- Aitken Double Star Catalogue
- AI Velorum star
- [[]] -> Astronomical Journal
- Akari
- Albategnius -> al-Battani
- al-Battani -> Battani
- Alcor
- Alexandra family
- ALEXIS
- Hannes Olof Gösta Alfvén
- Alfvén surface
- Algieba
- Algol star
- Algonquin Radio Observatory
- Alhena
- Allegheny Observatory
- Allende meteorite
- Allen Telescope Array
- all-sky camera
- ALMA -> Atacama Large Millimeter Array
- Almaak
- Almagest
- Alnath
- Alpha Capricornid meteors
- Alpha Crucis
- Alpha Cygnid meteors
- Alpha Cygni star
- Alpha Scorpiid meteors
- Alpha2 Canum Venaticorum star
- Alphekka
- Alrescha
- al-Sufi -> [[]]
- altazimuth mounting
- al-Tusi -> Tusi
- Viktor Amazaspovich Ambartsumian
- ambipolar diffusion
- AM Canum Venaticorum star
- American Association of Variable Star Observers
- American Astronomical Society
- Ames Research Center
- AM Herculis star
- Amor group
- Am star
- anaemic spiral galaxy
- Andromedid meteors
- Anglo-Australian Observatory
- Anglo-Australian Telescope
- Anders Jonas Ångström
- angular diameter
- angular distance -> angular separation
- angular resolution
- angular separation
- Ankaa
- annual equation
- annual inequality -> annual equation
- annual parallax
- annual variation
- anomalistic month
- anomalous Cepheid
- anomalous iron
- [[]] -> Astronomical Netherlands Satellite
- Antennae
- antenna pattern
- antenna temperature
- anthelion radiant
- [[]] -> galactic anticentre
- anti-dwarf nova
- antitail
- Eugène Michael Antoniadi
- Antu
- Apache Point Observatory
- aperture efficiency
- aperture ratio
- aperture synthesis
- [[]] -> Atacama Pathfinder Experiment
- Aphrodite Terra
- ApJ -> Astrophysical Journal
- apohele
- Apollo group
- Apollonius of Perga
- Apollo project
- apparent diameter -> angular diameter
- apparent noon
- apparent place
- apparent retrogression
- apparent sidereal time
- apparent solar time
- apsidal motion
- Ap star
- Aquarid meteors
- aqueous alteration
- François Arago
- Dominique François Jean Arago
- Arago ring
- arch filament system
- arc minute -> [[]]
- arc second -> [[]]
- area photometer
- Arecibo Observatory
- Comet Arend–Roland (C/1956 R1)
- Friedrich Wilhelm August Argelander
- Argelander step method
- argon–potassium method -> potassium–argon method
- argument of perihelion
- Argyre Planitia
- Ariel satellites
- Aristarchos Telescope
- Aristarchus of Samos
- Arizona meteor crater -> meteor crater
- Arizona Radio Observatory
- ARO
- AR Lacertae star
- arm population
- Arneb
- artificial satellite
- ASCA
- ascending node
- ashen light
- [[]] -> Astronomical Society of the Pacific
- stellar association
- Association of Universities for Research in Astronomy
- AURA
- A star
- Astrographic Catalogue
- astrometric binary
- Astronomer Royal for Scotland
- The Astronomical Almanac
- Astronomical Journal
- Astronomical Netherlands Satellite
- Astronomical Society of the Pacific
- astronomical triangle
- Astronomy and Astrophysics
- A&A -> Astronomy and Astrophysics
- Astrophysical Journal
- ASTROSAT
- [[]] -> ASCA
- asymptotic giant branch star
- AGB star
- Atacama Large Millimeter Array
- ALMA
- Atacama Pathfinder Experiment
- Aten group
- atmospheric extinction
- atmospheric refraction
- atmospheric scattering -> atmospheric extinction -> [[]] -> [[]]
- atmospheric window
- ATNF -> Australia Telescope National Facility
- Atria
- Auger shower -> cosmic-ray shower
- AURA -> Association of Universities for Research in Astronomy
- Aurora programme
- auroral oval
- auroral substorm -> [[]]
- Australia Telescope National Facility
- ATNF
- autoguider
- averted vision
- Avior
- Azophi -> al-Sufi
B
[edit]- [[]] -> British Astronomical Association
- Wilhelm Heinrich Walter Baade
- Walter Baade
- Baade's Window
- Baade–Wesselink method
- Harold Delos Babcock
- Horace Welcome Babcock
- background noise
- Bailey type
- Francis Baily
- Baker–Schmidt telescope
- Baldwin effect
- Balmer limit
- Balmer lines -> [[]]
- bandpass filter
- barium star
- Barlow lens
- Edward Emerson Barnard
- Barnard's Loop
- barn-door mount -> Scotch mount
- Barnes–Evans relationship
- barrel distortion
- Barringer Crater -> meteor crater
- Barycentric Celestial Reference System
- barycentric coordinates
- Barycentric Coordinate Time
- Barycentric Dynamical Time
- baryon star
- basaltic achondrite
- impact basin
- Muammad ibn Jabir al-Battani
- Ba II star -> [[]]
- Bautz–Morgan class
- Johann Bayer
- Bayer letters
- B band
- B-class asteroid
- BCRS -> Barycentric Celestial Reference System
- [[]] -> Bonner Durchmusterung
- Beagle
- beat Cepheid
- Becklin–Neugebauer Object (BN Object)
- Becrux
- Beehive Cluster -> Praesepe
- Susan Jocelyn Bell Burnell
- Jocelyn Bell Burnell
- Belt of Orion
- Benetnasch -> [[]]
- Comet Bennett (C/1969 Y1)
- bent-pillar mounting
- BepiColombo
- BeppoSAX
- Berkeley–Illinois–Maryland Association Array (BIMA Array)
- Friedrich Wilhelm Bessel
- Besselian day numbers
- Besselian elements
- Besselian epoch
- Besselian year
- Be star
- B(e) star
- Beta Canis Majoris star -> Beta Cephei star
- Beta Cephei star
- Beta Crucis
- Beta Lyrae star
- Beta Persei star -> Algol star
- Beta Pictoris
- Beta Regio
- Beta Taurid meteors
- Hans Albrecht Bethe
- Bethe–Weizsäcker cycle -> carbon–nitrogen cycle
- Bianchi cosmology
- biconcave lens
- biconvex lens
- Comet 3D/Biela
- Bielid meteors -> Andromedid meteors
- Big Bang theory
- Big Bear Solar Observatory
- BIMA Array
- binary galaxy
- binary pulsar
- Jean-Baptiste Biot
- bipolar group
- bipolar nebula
- bipolar outflow
- birefringent filter
- Birmingham Solar Oscillations Network
- BiSON -> Birmingham Solar Oscillations Network
- black-body radiation
- Black Eye Galaxy
- Black Widow Pulsar -> [[]]
- Blaze Star
- Blazhko effect
- BL Herculis star
- blink comparator
- Blinking Planetary
- BL Lacertae object
- bloomed lens
- blue clearing
- blue compact dwarf galaxy
- blue Moon
- Blue Planetary
- blue populous cluster -> [[]]
- B magnitude
- BN Object -> Becklin–Neugebauer Object
- Johann Elert Bode
- Bartholomeus Jan Bok
- Bartholomeus 'Bart' Jan Bok
- George Phillips Bond
- William Cranch Bond
- Bond albedo
- Hermann Bondi
- Bonner Durchmusterung
- Boss General Catalogue
- boundary layer
- bound–bound transition
- bound–free transition
- Bouwers telescope
- Ira Sprague Bowen
- Bowen fluorescence
- Bp star
- Brackett series
- James Bradley
- Bragg crystal spectrometer
- Tycho Brahe
- Brans–Dicke theory
- bridge (astronomy)
- bright nebula
- brightness temperature
- Bright Star Catalogue
- British Astronomical Association
- broad-band photometry
- Brocchi's Cluster
- Comet 16P/Brooks 2 -> Jupiter comet family
- Ernest William Brown
- B star
- Bubble Nebula
- Budrosa family
- Bug Nebula
- bump Cepheid
- Geoffrey Ronald Burbidge
- Eleanor Margaret Burbidge
- burst (astronomy)
- Butcher–Oemler effect
- Butler matrix
- Butterfly Cluster
- butterfly diagram
- Butterfly Nebula
- BV photometry
- Bw star
- BY Draconis star
- Byurakan Astrophysical Observatory
C
[edit]- Calar Alto Observatory
- California Nebula
- Callippus
- Caloris Basin
- Caltech Submillimeter Observatory
- Calypso (moon)
- Cambridge Optical Aperture Synthesis Telescope
- COAST
- William Wallace Campbell
- Canada–France–Hawaii Telescope
- Martian canals
- Annie Jump Cannon
- cantaloupe terrain
- Cape Photographic Durchmusterung
- Cape photometry
- Cape RI photometry -> Kron–Cousins RI photometry
- Cape York meteorite
- Caph
- Capricornid meteors
- captured rotation -> synchronous rotation
- Carafe Galaxy
- [[]] -> carbon–nitrogen cycle
- carbon flash
- carbon–nitrogen cycle (CN cycle)
- Carina Arm
- Carina Dwarf Galaxy
- Carina–Sagittarius Arm
- CARMA -> Combined Array for Research in Millimeter-wave Astronomy
- Carnegie Observatories
- Richard Christopher Carrington
- Carrington heliographic coordinates
- Carrington rotation
- Carte du Ciel
- Cartwheel Galaxy
- Cassegrain telescope
- Giovanni Domenico Cassini
- Jacques Cassini
- Cassini–Huygens
- Cassiopeia A
- Castalia
- cataclysmic binary
- cataclysmic variable
- catadioptric system
- Catalina Sky Survey
- catalogue equinox
- catoptric system
- Cat's Eye Nebula
- CCD spectrometer
- C-class asteroid
- cD Galaxy
- [[]] -> Centre de Données astronomiques de Strasbourg
- celestial axis
- celestial coordinates
- Celestial Intermediate Reference System
- celestial latitude
- celestial longitude
- celestial meridian
- Centaur group
- Centaurus A
- Center for Astrophysics
- Central Bureau for Astronomical Telegrams
- central meridian
- central peak
- Centre de Données astronomiques de Strasbourg
- Cepheid instability strip
- Cepheid variable
- Cerenkov counter
- Cerro Pachón
- Cerro Paranal
- Cerro Tololo Inter-American Observatory
- CfA -> Harvard–Smithsonian Center for Astrophysics
- CGRO -> Compton Gamma Ray Observatory
- Chandler period
- Chandler wobble
- Subrahmanyan Chandrasekhar
- Chandrasekhar-Schönberg limit
- Chandra X-ray Observatory
- Chandrayaan-1
- Chang'e
- chaotic orbit
- chaotic terrain
- CHARA Array
- Chicxulub
- CHIPSat
- Ernst Florens Friedrich Chladni
- chopping secondary
- William Henry Mahoney Christie
- chromospheric network
- Chryse Planitia
- CH star
- Circlet
- circular velocity
- circumstellar maser
- circumstellar matter
- Cirrus Nebula -> Veil Nebula
- CIRS -> Celestial Intermediate Reference System
- Alexis Claude Clairaut
- Alvan Clark
- classical Cepheid
- CLEAN
- James Clerk Maxwell
- C line
- clock drive -> [[]]
- clock star
- closed universe
- Clown Face Nebula -> Eskimo Nebula
- cluster, star -> [[]]
- cluster of galaxies
- cluster variable -> RR Lyrae star
- CM relation -> colour–magnitude relation
- CN band
- CN cycle -> carbon–nitrogen cycle
- [[]] -> carbon–nitrogen–oxygen cycle
- CN star
- Coalsack
- coaltitude
- COAST
- Coathanger
- COBE
- Cocoon Nebula
- cocoon star
- [[]] -> Córdoba Durchmusterung
- coded mask
- coherence bandwidth
- cold camera
- collimation error
- Colombo Gap
- [[]] -> colour index
- [[]] -> colour index
- colour excess
- colour index
- colour–luminosity relation -> colour–magnitude relation
- colour–magnitude relation
- colour temperature
- cometary coma
- optical coma
- Coma Cluster
- Coma Star Cluster
- Coma–Virgo Cluster -> Virgo Cluster
- Combined Array for Research in Millimeter-wave Astronomy
- combined magnitude
- cometary globule
- comet family
- comet-seeker
- Andrew Ainslie Common
- common envelope binary
- common proper motion
- compact galaxy
- compact object
- compact source
- comparison spectrum
- composite-spectrum binary
- Compton Gamma Ray Observatory
- Compton–Getting effect
- Compton upscattering -> inverse Compton scattering
- Concordia family
- Cone Nebula
- constant of aberration -> [[]]
- constructive interference -> [[]]
- contact binary
- continuous creation
- continuous spectrum
- stellar convection
- convective envelope
- convective equilibrium
- convective overshoot -> [[]]
- convective zone
- convergent point
- converging lens
- Thomas Cooke
- cooled camera -> cold camera
- cooling flow
- [[]] -> celestial coordinates
- coordinate time
- Nicolaus Copernicus
- Copernicus satellite
- Coprates
- Córdoba Durchmusterung
- planetary core
- stellar core
- core collapse
- coronal bright point
- coronal condensation
- coronal lines
- coronal loop
- coronal plume
- coronal rain
- COROT
- co-rotation
- corpuscular radiation
- corrector plate
- correlation detection
- correlation receiver
- COS-B
- cosmic abundance
- Cosmic Background Explorer
- cosmic censorship
- cosmic dust
- cosmic-ray shower
- cosmic scale factor
- cosmic texture
- cosmic year
- cosmological distance scale
- Cosmos satellites
- COSPAR
- coudé focus
- Couder telescope
- Philip Herbert Cowell
- c.p.m. -> common proper motion
- Crab Nebula
- Crab Pulsar
- crater chain
- crater counting
- crêpe ring
- Crimean Astrophysical Observatory
- critical density
- Andrew Claude de la Cherois Crommelin
- cross-axis mounting
- crossing time
- cross-wire micrometer
- C star
- CTIO -> Cerro Tololo Inter-American Observatory
- Cubewano
- curvature of field
- curvature of space -> curvature of spacetime
- curvature of spacetime
- curvature radiation
- curve of growth
- cusp gap
- Cybele group
- cyclotron maser
- cyclotron radiation
- Cygnus A
- Cygnus Loop
- Cygnus Rift
- Cygnus X-1
D
[edit]- Dactyl
- Dall–Kirkham telescope
- Damocles
- André Danjon
- Danjon astrolabe
- Danjon scale
- dark adaptation
- dark galaxy
- daughter isotope
- Davida
- David Dunlap Observatory
- Raymond Davis, Jr
- William Rutter Dawes
- Dawes limit
- [[]] -> Summer Time
- day number
- D-class asteroid
- DCT -> Discovery Channel Telescope
- DDO classification
- DDO photometry
- deceleration parameter
- Comet de Chéseaux (C/1743 X1)
- declination axis
- Deep Impact
- deep-sky object
- Deep Space Network
- Deep Space 1
- defect of illumination
- deflection of light
- degenerate star
- degree of arc
- delay line
- Delta Aquarid meteors
- Delta Cepheid star -> classical Cepheid
- Delta Delphini star
- Delta Scuti star
- delta T
- ΔT
- Demon Star
- William Frederick Denning
- density parameter
- density wave
- descending node
- Willem de Sitter
- de Sitter universe
- destructive interference -> [[]]
- detached binary
- Gérard Henri de Vaucouleurs
- dew cap
- D galaxy
- Diana Chasma
- dichroic mirror
- Robert Henry Dicke
- Dicke radiometer
- Dicke switch
- dielectronic recombination
- differential rotation
- diffraction-limited
- diffraction rings
- diffuse interstellar bands
- diffuse nebula
- dioptric system
- Dirac cosmology
- direct motion
- disconnection event
- Discovery Channel Telescope
- Discovery Program
- dish antennae
- disk galaxy
- disk population
- disparition brusque -> [[]]
- dispersion measure
- distance modulus
- diurnal inequality
- diurnal libration
- diurnal motion
- diurnal parallax
- diverging lens
- D layer
- D lines
- dMe star
- John Dollond
- Dominion Astrophysical Observatory
- Dominion Radio Astrophysical Observatory
- Comet Donati (C/1858 L1)
- Christian Johann Doppler
- Doppler broadening
- Double Cluster
- Double Double
- double-lined binary
- double-mode variable
- double pulsar
- DQ Herculis star
- Draconid meteors -> Giacobinid meteors
- Henry Draper
- Johan Ludvig Emil Dreyer
- drifting sub-pulse
- drift scan
- D star
- Dumbbell Nebula
- dust tail -> cometary tail
- dwarf Cepheid
- dwarf nova
- dwarf variable
- Dwingeloo galaxy
- Dwingeloo Radio Observatory
- dynamical equinox
- dynamical friction
- dynamical parallax
- dynamical time
- Frank Watson Dyson
E
[edit]- Eagle Nebula
- early-type galaxy
- Earth coorbital asteroid -> Apollo group -> Aten group
- Earth-crossing asteroid -> Amor group
- Earth-approaching asteroid
- echelle spectrograph
- E-class asteroid
- eclipse season
- eclipse year
- ecliptic coordinates
- ecliptic latitude
- ecliptic limits
- ecliptic longitude
- ecliptic pole
- E corona
- Arthur Stanley Eddington
- Eddington limit
- Edgeworth–Kuiper Belt -> [[]]
- E-ELT -> European Extremely Large Telescope
- effective aperture
- effective area
- effective focal length
- effective temperature
- Effelsberg Radio Observatory
- Egg Nebula
- Albert Einstein
- Einstein coefficient
- Einstein Cross
- Einstein–de Sitter universe
- Einstein Observatory
- Einstein shift -> [[]]
- E layer
- electron degeneracy
- electron scattering opacity
- electron temperature
- optical element
- abundance of elements
- orbital elements
- E line
- Ellerman bomb
- ellipsoidal variable
- elliptic aberration -> E-terms
- [[]] -> Alnath
- [[]] -> Etamin
- Elysium Planitia
- emission spectrum
- photographic emulsion
- Comet 2P/Encke
- Johann Franz Encke
- Encke Division
- English mounting
- Ensisheim meteorite
- enstatite chondrite
- envelope (astronomy)
- Eos family
- Ep galaxy
- Ephemeris Time
- e-process
- Epsilon Aurigae
- equation (astronomy)
- equation of light
- equation of the centre
- equation of the equinoxes
- equation of the origins
- equation of time
- equatorial bulge
- equatorial coordinates
- equatorial horizontal parallax
- equatorial mounting
- equinoctial colure
- equivalent focal length
- equivalent width
- [[]] -> Earth rotation angle
- Eratosthenes
- Erfle eyepiece
- eruptive binary
- eruptive prominence
- eruptive variable
- [[]] -> European Space Agency
- Eskimo Nebula
- ESO -> European Southern Observatory
- [[]] -> Ephemeris Time
- Eta Aquarid meteors
- Eta Carinae
- Eta Carinae Nebula
- Etamin
- E-terms
- Eudoxus of Cnidus
- Leonhard Euler
- Eunomia family
- European Extremely Large Telescope
- European Southern Observatory
- European Space Agency
- European VLBI Network
- [[]] -> extreme ultraviolet
- EUVE -> Extreme Ultraviolet Explorer
- Evershed effect
- EVN -> European VLBI Network
- evolved star
- excitation temperature
- exit cone
- exit pupil
- EX Lupi star
- ExoMars
- EXor -> EX Lupi star
- Exosat
- expanding universe
- Explorer
- exposure age
- extended source
- atmospheric extinction
- extragalactic nebula -> [[]]
- extreme Population I star
- extreme ultraviolet
- Extreme Ultraviolet Explorer
- extrinsic variable
- eye lens
- eye relief
F
[edit]- Faber–Jackson relation
- David Fabricius
- Johann Fabricius
- Johannes Fabricius
- Fabry lens
- Fabry–Perot interferometer
- False Cross
- Fanaroff–Riley class
- fan beam
- Faraday effect
- far infrared
- far ultraviolet
- Far Ultraviolet Spectroscopic Explorer
- Fast Auroral Snapshot Explorer
- fast nova
- Faulkes Telescopes
- F band
- F-class asteroid
- F corona
- field curvature -> curvature of field
- field equations
- field flattener
- field lens
- field star
- field stop
- 53 Persei star
- filamentary nebula
- filar micrometer
- filled aperture
- filled-centre supernova remnant -> [[]]
- fine structure
- first point of Libra
- Fish Mouth
- fission track
- Fitzgerald contraction -> Lorentz–Fitzgerald contraction
- FK Comae Berenices star
- John Flamsteed
- Flamsteed numbers
- flare star
- flash spectrum
- flash star
- polar flattening
- F layer
- Williamina Paton Fleming
- Flora group
- flux collector
- flux tube
- f/number
- focal distance
- focal ratio
- focal reducer
- focal surface
- optical focus
- orbital focus
- Fokker–Planck equation
- folded dipole
- [[]] -> coronal loop
- forbidden line
- Forbush effect
- fork mounting
- Fornax A
- Fornax Dwarf Galaxy
- 47 Tucanae
- forward scattering
- Foucault test
- four-colour photometry -> Strömgren photometry
- Fourier analysis
- Fourier transform spectrometer
- fourth contact
- William Alfred Fowler
- Fp star
- fractional method
- Franklin-Adams charts
- Joseph von Fraunhofer
- Fraunhofer lines
- Fred Lawrence Whipple Observatory
- free–bound transition
- free–free transition
- frequency analysis -> Fourier analysis
- Friedmann universe
- [[]] -> interference pattern
- fringe pattern
- f-spot
- F star
- FTS -> Fourier transform spectroscopy
- full Moon
- full-wave dipole
- full width at half maximum
- fundamental catalogue
- fundamental mode
- fundamental plane
- fundamental star
- [[]] -> FU Orionis star
- FUSE -> Far Ultraviolet Spectroscopic Explorer
- fusion crust
- future light cone -> [[]]
- FWHM -> full width at half maximum
G
[edit]- [[]] -> acceleration of free fall
- galactic anticentre
- galactic bulge
- galactic centre
- galactic cluster
- galactic coordinates
- galactic disk
- galactic equator
- galactic latitude
- galactic longitude
- galactic magnetic field
- galactic nucleus
- galactic plane
- galactic pole
- galactic rotation
- galactic window
- [[]] -> cosmic year
- galaxy cannibalism
- galaxy encounter
- galaxy evolution
- Galaxy Evolution Explorer
- galaxy formation
- galaxy merger
- [[]] -> Galaxy Evolution Explorer
- Galileo Galilei
- Galileo National Telescope
- Galileo Regio
- Johann Gottfried Galle
- Galle Ring
- Gamma Cassiopeiae star
- Gamma Crucis
- Gamma Doradus star
- gamma-ray background
- Gamma-ray Large Area Space Telescope
- gamma-ray telescope
- George Gamow
- Sergei Illarionovich Gaposchkin -> Cecilia Payne-Gaposchkin
- Gaspra
- gas scintillation proportional counter
- gas tail -> cometary tail
- Carl Friedrich Gauss
- Gaussian gravitational constant
- G band
- G-class asteroid
- GCRS -> Geocentric Celestial Reference System
- GCVS -> General Catalogue of Variable Stars
- Geminga
- Geminid meteors
- Gemini Observatory
- [[]] -> Alphekka
- General Catalogue of Variable Stars
- general precession
- general theory of relativity
- Geneva photometry
- Geocentric Celestial Reference System
- geocentric coordinates
- geocentric equatorial parallax
- geocentric parallax
- Geographos
- geomagnetic storm
- geometrical albedo
- geometrical libration -> optical libration
- georgiaite
- geostationary orbit
- geosynchronous orbit
- geotail -> [[]]
- germanium detector
- German mounting
- ghost crater
- Ghost of Jupiter
- Riccardo Giacconi
- Giacobinid meteors
- Comet 21P/Giacobini–Zinner
- giant branch
- Giant Magellan Telescope
- Giant Metrewave Radio Telescope
- giant molecular cloud
- Gienah
- David Gill
- Ginga
- GLAST -> Gamma-ray Large Area Space Telescope
- Glauke
- Global Oscillation Network Group
- [[]] -> Greenwich Mean Astronomical Time
- [[]] -> giant molecular cloud
- GMST -> Greenwich Mean Sidereal Time
- [[]] -> Giant Magellan Telescope
- Goddard Space Flight Center
- Gödel universe
- Thomas Gold
- Goldstone
- GONG -> Global Oscillation Network Group
- John Goodricke
- GoTo telescope
- Benjamin Apthorp Gould
- Gould's Belt
- interplanetary grains
- interstellar grains
- grand unified theory
- Gran Telescopio Canarias
- grating spectrometer
- gravitational acceleration
- gravitational deflection
- gravitational energy
- gravitational instability
- gravitational mass
- gravity gradient
- Gravity Probe B
- grazing-incidence telescope
- grazing occultation
- Great Attractor
- Great Dark Spot
- greatest brilliancy
- greatest elongation
- Great Observatories
- Great Rift
- Great September Comet (C/1882 R1)
- Green Bank
- Green Bank Telescope
- Greenwich hour angle
- Greenwich Mean Astronomical Time
- Greenwich Mean Sidereal Time
- Greenwich meridian
- Greenwich Observatory
- Greenwich sidereal date
- Greenwich Sidereal Time
- Gregorian telescope
- James Gregory
- Comet 26P/Grigg–Skjellerup
- grooved terrain
- Grotrian diagram
- GRS -> [[]]
- Howard Grubb
- [[]] -> Greenwich Sidereal Time
- G star
- GTC -> Gran Telescopio Canarias
- Guardians
- guide star
- guide telescope
- Gum Nebula
- [[]] -> grand unified theory
- GW Virginis star -> ZZ Ceti star
- gyrosynchrotron radiation
H
[edit]- [[]] -> hour angle
- Hadar
- Hadley circulation
- Hadley Rille
- hadron era
- HAEBE -> Herbig Ae/Be star
- Haedi -> Kids
- Haig mount -> Scotch mount
- Hakucho
- HALCA
- George Ellery Hale
- Comet Hale–Bopp (C/1995 01)
- Hale Observatories
- Hale's law -> bipolar group
- Hale telescope
- half-wave dipole
- [[]] -> full width at half maximum
- Asaph Hall
- Edmond Halley
- Halley-family comet
- atmospheric halo
- halo CME
- halo orbit
- halo population
- Hα
- H and K lines
- Hanle effect
- hard X-rays
- Haro galaxy
- Hartebeesthoek Radio Astronomy Observatory
- HartRAO -> Hartebeesthoek Radio Astronomy Observatory
- Hartmann test
- [[]] -> HALCA
- Harvard classification
- Harvard College Observatory
- Harvard Revised Photometry
- Harvard–Smithsonian Center for Astrophysics
- harvest Moon
- Hat Creek Radio Observatory
- Haute-Provence Observatory
- Stephen William Hawking
- Hayabusa
- Hayashi track
- Haystack Observatory
- [[]] -> Hickson compact group
- HD Catalogue -> Henry Draper Catalogue
- cometary head
- head–tail galaxy
- HEAO -> High Energy Astrophysical Observatory
- heat death of the Universe
- Heaviside layer -> E layer
- heavy element
- heavy-metal star
- heliacal rising and setting
- heliocentric coordinates
- heliocentric latitude
- heliocentric longitude
- heliocentric parallax -> annular parallax
- heliographic coordinates
- Helios probes
- helium shell flash
- Helix Nebula
- Hellas Planitia
- Helmholtz–Kelvin contraction
- hemispherical albedo
- Henry Draper Catalogue
- Henyey track
- Heraclides of Pontus
- Herbig Ae/Be star
- Herbig–Haro object
- Hercules Cluster
- Hercules X-1
- Caroline Lucretia Herschel
- Karoline Lucretia Herschel -> Caroline Lucretia Herschel
- John Frederick William Herschel
- Frederick William Herschel -> William Herschel
- Friedrich Wilhelm Herschel -> William Herschel
- William Herschel
- Herschelian telescope
- Comet 35P/Herschel–Rigollet
- Herschel Space Observatory
- Hertha family -> Nysa family
- Ejnar Hertzsprung
- Hertzsprung gap
- Victor Francis Hess
- HESSI -> Ramaty High-energy Solar Spectroscopic Imager
- HETE-2 -> High Energy Transient Explorer-2
- Johannes Hevelius
- Antony Hewish
- HH object -> Herbig–Haro object
- Hickson compact group
- hierarchical cosmology
- High Energy Astrophysical Observatory
- high-energy astrophysics
- High-Energy Transient Explorer-2
- lunar highlands
- high-speed photometry
- high-velocity cloud
- high-velocity star
- Hilda group
- George William Hill
- Hind's Crimson Star
- Hind's Variable Nebula
- Hinotori
- Hipparchus of Nicaea
- Hipparcos
- Hirayama family
- Hiten
- H line -> H and K lines
- H magnitude
- Hoba West meteorite
- Hobby–Eberly Telescope
- Hohmann orbit
- Holmberg radius
- Homunculus Nebula
- H I region
- Hooker Telescope
- horizontal branch
- horizontal coordinates
- horizontal parallax
- horizontal refraction
- Jeremiah Horrocks
- Jeremiah Horrox -> Jeremiah Horrocks
- Horsehead Nebula
- horseshoe mounting
- Horseshoe Nebula
- horseshoe orbit
- hot Big Bang
- hour angle
- hour circle
- Hourglass Nebula
- Fred Hoyle
- HPBW -> half-power beamwidth
- half-power beamwidth -> [[]]
- HR diagram -> [[]]
- HR number
- HSO -> Herschel Space Observatory
- [[]] -> Hubble Space Telescope
- H20 maser
- Edwin Powell Hubble
- Hubble classification
- Hubble diagram
- Hubble flow
- Hubble parameter -> [[]]
- Hubble radius
- Hubble–Sandage variable
- Hubble Space Telescope
- Hubble's Variable Nebula
- William Huggins
- Hendrik ('Henk') Christoffel van de Hulst
- Milton Lasell Humason
- hummocky terrain
- Humphreys series
- Hungaria group
- hunter's Moon
- Huygenian eyepiece
- Christiaan Huygens
- Huygens Gap
- Huygens probe
- Comet Hyakutake (C/1996 B2)
- hydrogen emission region
- [[]] -> 21-centimetre line
- hyperbolic comet
- hyperbolic orbit
- hyperbolic velocity
- hypergiant star
- hypersthene achondrite -> [[]]
- hypervelocity impact
- HZ43
I
[edit]- [[]] -> International Astronomical Union
- [[]] -> Index Catalogue
- [[]] -> International Cometary Explorer
- ICRF -> International Celestial Reference Frame
- ICRS -> International Celestial Reference System
- [[]] -> intergalactic medium
- IGY -> International Geophysical Year
- Comet Ikeya–Seki (C/1965 S1)
- Comet Ikeya–Zhang (153P/)
- IMAGE -> Imager for Magnetopause-to-Aurora Global Exploration
- image intensifier -> [[]]
- Image Photon Counting System
- Imager for Magnetopause-to-Aurora Global Exploration
- imaging photometer -> area photometer
- I magnitude
- Imbrium Basin
- impersonal astrolabe -> Danjon astrolabe
- Index Catalogue
- inertial coordinate system
- inertial mass
- inertial reference frame
- infall velocity
- inferior conjunction
- inflationary universe
- Infrared Astronomical Satellite
- infrared cirrus
- infrared excess
- infrared photometry
- infrared source
- Infrared Space Observatory
- infrared telescope
- infrared window
- Robert Thorburn Ayton Innes
- Innisfree meteorite
- instability strip
- Institut de Radio Astronomie Millimétrique
- INT -> Isaac Newton Telescope
- [[]] -> International Gamma-Ray Astrophysics Laboratory
- integrated magnitude
- integration time
- intensity interferometer
- interacting binary
- interacting galaxy
- Interamnia
- interference pattern
- intergalactic absorption
- intergalactic magnetic field
- intergalactic medium
- intermediate-band photometry
- intermediate-population star
- intermediate-type star
- International Astronomical Union
- International Atomic Time
- International Celestial Reference Frame
- International Celestial Reference System
- International Cometary Explorer
- International Gamma-Ray Astrophysics Laboratory
- International Geophysical Year
- International Sun–Earth Explorer
- International Sunspot Number
- International Ultraviolet Explorer
- International Years of the Quiet Sun
- interplanetary matter
- interplanetary scintillation
- interstellar absorption
- interstellar maser
- interstellar matter
- interstellar molecule
- interstellar reddening -> interstellar absorption
- interstellar scintillation
- interstellar wind
- intrinsic colour index
- intrinsic variable
- invariable plane
- inverse Compton effect
- inverse Compton scattering -> inverse Compton effect
- inverse P Cygni profile -> P Cygni profile
- inversion layer -> atmospheric transparency
- Io (moon)
- iodine cell
- ionization equilibrium
- ionization front
- ionization potential
- ionization temperature
- ionospheric scintillation
- ion tail -> cometary tail
- Iota Aquarid meteors
- IPCS -> Image Photon Counting System
- IQSY -> International Years of the Quiet Sun
- IRAM -> Institut de Radio Astronomie Millimétrique
- IRAS -> Infrared Astronomical Satellite
- Comet IRAS–Araki–Alcock (C/1983 H1)
- Iris (asteroid)
- iron peak
- irregular variable
- IRTF -> NASA Infrared Telescope Facility
- Isaac Newton Group
- Isaac Newton Telescope
- [[]] -> International Sun–Earth Explorer
- Ishtar Terra
- [[]] -> interstellar matter -> [[]]
- ISO (observatory) -> Infrared Space Observatory
- isophotal wavelength
- isothermal process
- isothermal region
- IUE -> International Ultraviolet Explorer
- Izar
J
[edit]- James Clerk Maxwell Telescope
- James Webb Space Telescope
- Karl Guthe Jansky
- (Pierre) Jules César Janssen
- Janus (moon)
- JCMT -> James Clerk Maxwell Telescope
- [[]] -> Julian Date
- James Hopwood Jeans
- Jeans length
- Jeans mass
- jet (astronomical objects)
- Jet Propulsion Laboratory
- Jewel Box
- Jilin meteorite
- J magnitude
- Job's Coffin
- Jodrell Bank Observatory
- Johnson photometry
- Johnson Space Center
- Joint Astronomy Centre
- Harold Spencer Jones
- [[]] -> Jet Propulsion Laboratory
- Julian Date
- Julian day number
- Julian epoch
- Juliet (moon)
- Juno (asteroid)
- Jupiter (planet)
- Jupiter–family comet
- [[]] -> James Webb Space Telescope
K
[edit]- [[]] -> kelvin scale
- Immanuel Kant
- Kappa Crucis Cluster -> Jewel Box cluster
- Kappa Cygnid meteors
- kappa mechanism
- Jacobus Cornelius Kapteyn
- Kapteyn Selected Areas
- Kapteyn's Star
- Kaus Australis
- K corona
- K-correction
- Keck Telescopes
- Keeler Gap
- Kellner eyepiece
- Lord (William Thomson) Kelvin
- Kelvin–Helmholtz contraction -> Helmholtz–Kelvin contraction
- kelvin scale
- Kennedy Space Center
- Kepler (satellite)
- Johannes Kepler
- Johann Kepler -> Johannes Kepler
- Kepl7erian telescope
- Kepler's Star
- Keyhole Nebula
- Kids (asterism)
- kinematic parallax
- Gustav Robert Kirchhoff
- Kirchhoff's laws
- Kirin meteorite -> Jilin meteorite
- Daniel Kirkwood
- Kirkwood gaps
- Kitt Peak National Observatory
- Kleinmann–Low Nebula
- KL Nebula -> Kleinmann–Low Nebula
- K line -> H and K lines
- K magnitude
- knife-edge test -> Foucault test
- Comet Kohoutek (C/1973 E1)
- König eyepiece -> Erfle eyepiece
- Koronis family
- KPNO -> Kitt Peak National Observatory
- Kracht group
- Kramers opacity
- Kreutz sungrazer
- Kron–Cousins RI photometry
- Kruskal diagram
- K star
- Kueyen
- Gerard Peter Kuiper
- Kuiper Airborne Observatory
L
[edit]- Nicolas Louis de Lacaille
- Lacertid -> BL Lacertae object
- Lagoon Nebula
- Joseph Louis de Lagrange(-Tournier)
- l'Aigle meteorite shower
- Joseph Jérôme (Le Français) de Lalande
- Lalande 21185
- Lambda Boötis star
- Lambda Eridani star
- La Palma -> Roque de los Muchachos Observatory
- Pierre Simon de Laplace
- Laplacian plane
- Large Binocular Telescope
- Large Millimeter Telescope
- large-scale structure
- Large Synoptic Survey Telescope
- Las Campanas Observatory
- Laser Interferometer Space Antenna
- La Silla Observatory
- William Lassell
- Lassell ring
- last contact
- La Superba
- late heavy bombardment
- late-type galaxy
- latitude variation
- [[]] -> luminous blue variable
- L dwarf
- least circle of confusion -> [[]] -> [[]]
- Henrietta Swan Leavitt
- Leda (moon)
- Georges Édouard Lemaître
- Lemaître universe
- Lense–Thirring effect -> [[]]
- Leo (constellation)
- Leo Minor (constellation)
- Leonid meteors
- lepton era
- Leto family
- Urbain Jean Joseph Le Verrier <-> Urbain Jean Joseph Leverrier
- Le Verrier Ring
- Comet Lexell (D/1770 L1)
- [[]] -> local hour angle
- LHA
- Libra (constellation)
- first point of Libra
- libration point -> [[]]
- Lick Observatory
- [[]] -> flux collector
- light-curve
- light pressure -> [[]]
- light time
- limb brightening
- limb darkening
- limiting magnitude
- Lincoln Near-Earth Asteroid Research
- Bertil Lindblad
- Lindblad resonance
- line blanketing
- line broadening
- line of apsides
- line of inversion -> magnetic inversion line
- line profile
- line ratio
- line receiver
- line wing
- [[]] -> Laser Interferometer Space Antenna
- LISA Pathfinder
- Lissajous orbit
- lithium star
- lithosiderite -> stony-iron meteorite
- Little Dumbbell
- Liverpool Telescope
- L magnitude
- LMT -> Large Millimeter Telescope
- lobate ridge
- lobate scarp
- local arm
- local bubble
- local hour angle
- local mean time
- local sidereal time
- local standard of rest
- local supercluster
- local thermodynamic equilibrium
- local time
- Lockman hole
- (Joseph) Norman Lockyer
- LOFAR -> Low Frequency Array
- LONEOS -> Lowell Observatory Near-Earth Object Search
- long-baseline interferometry
- longitude at the epoch
- longitude of perigee
- longitude of perihelion
- longitude of the ascending node
- long-period comet
- long-period variable
- lookback time
- loop prominence
- Lorentz–Fitzgerald contraction
- Lost City meteorite
- (Alfred Charles) Bernard Lovell
- Lovell Telescope
- Percival Lowell
- Lowell Observatory
- Lowell Observatory Near-Earth Object Search
- lower culmination
- Low Frequency Array
- low-luminosity star
- low-mass star
- low surface brightness galaxy
- low-velocity star
- [[]] -> Lunar Reconnaissance Orbiter
- [[]] -> local standard of rest
- LSST -> Large Synoptic Survey Telescope
- LST -> local sidereal time
- [[]] -> lunar transient phenomenon
- luminosity class
- luminosity evolution -> galaxy evolution
- luminosity–volume test
- luminous arc
- luminous blue variable
- Luna (Moon probes)
- lunar inequality
- Lunar Module
- Lunar Orbiter
- lunar parallax
- Lunar Prospector
- Lunar Reconnaissance Orbiter
- lunar theory -> lunar inequality
- lunar transient phenomenon
- Knut Emil Lundmark
- lunisolar precession
- lunitidal interval
- Lunokhod
- Lutz–Kelker bias
- Willem ('William') Jacob Luyten
- l.y. -> [[]]
- Lydia family
- Lyman-α forest
- Lyman-break Galaxy
- Lyman limit
- Lyman series
- Lynx (constellation)
- Bernard Ferdinand Lyot
- Lyot filter -> birefringent filter
- Lyra (constellation)
- Lyrid meteors
M
[edit]- [[]] -> Messier Catalogue
- Maffei Galaxies
- Magdalena Ridge Observatory
- Magellanic Stream
- Magellan Telescopes
- magnetic inversion line
- magnetic star
- magnetic storm -> geomagnetic storm
- magnetic variable
- magnetobremsstrahlung
- magnitude of an eclipse
- main beam
- main-belt asteroid -> [[]]
- main lobe -> main beam
- Malin-1
- Malmquist bias
- manganese–mercury star -> mercury–manganese star
- manganese star
- many-body problem -> [[]]
- mare (astronomy)
- Maria family
- Mariner Valley -> [[]]
- Mars (planet)
- Marsden group
- Mars Exploration Rover
- Mars Global Surveyor
- Marshall Space Flight Center
- Mars Odyssey (2001 Mars Odyssey)
- Mars Pathfinder
- Mars probes
- Mars Reconnaissance Orbiter
- maser amplifier
- maser source
- Nevil Maskelyne
- mass discrepancy
- mass loss
- mass–luminosity relation
- mass–radius relation
- mass ratio
- mass-to-light ratio
- mass transfer
- John Cromwell Mather
- matter era
- Mauna Kea Observatories
- (Edward) Walter Maunder
- maximum-entropy method
- James Clerk Maxwell
- Maxwell Gap
- Maxwell Montes
- Maxwell Telescope -> James Clerk Maxwell Telescope
- Mayall Telescope
- McDonald Observatory
- McIntosh scheme -> [[]]
- M-class asteroid
- McMath–Pierce Solar Telescope
- MDM Observatory
- mean daily motion
- mean density of matter
- mean equator
- mean equinox
- mean parallax -> statistical parallax
- mean place
- mean pole
- mean position -> mean place
- mean sidereal time
- mean solar time
- mean sun
- medium-band photometry
- megaregolith
- Megrez
- Melipal
- meniscus lens
- meniscus Schmidt telescope
- Mensa (constellation)
- mensa (planets)
- Donald Howard Menzel
- Merak
- mercury-manganese star
- Mercury Surface, Space Environment, Geochemistry, and Ranging
- celestial meridian
- terrestrial meridian
- meridian angle
- meridian astronomy
- meridian circle
- meridian passage -> meridian transit
- meridian telescope -> meridian circle -> transit circle -> transit instrument
- meridian transit
- MERLIN -> Multi-Element Radio-Linked Interferometer Network
- MESSENGER -> Mercury Surface, Space Environment, Geochemistry, and Ranging
- Charles Joseph Messier
- Messier Catalogue
- Me star
- metallic hydrogen
- metal-poor star
- metal-rich star
- metastable state
- Meteor Crater
- meteor storm
- meteor stream
- meteor swarm
- methanol maser
- Meudon Observatory
- Meyer group
- Miaplacidus
- Mice (galaxies)
- Albert Abraham Michelson
- Michelson interferometer
- Michelson–Morley experiment
- Michelson stellar interferometer -> stellar interferometer
- microchannel plate detector
- micrometer (measuring instrument)
- micropore optics
- Microscopium (constellation)
- Microvariability and Oscillations of Stars
- microvariable
- microwave background radiation
- Midcourse Space Experiment
- millimetre-wave astronomy
- millimetre waves
- millisecond pulsar
- Mills cross
- Edward Arthur Milne
- Milne–Eddington approximation
- Mimas (moon)
- Hermann Minkowski
- Rudolph Leo Bernhard Minkowski
- Minor Planet Center
- [[]] <-> [[]]
- Mirach
- Miranda (moon)
- Mira star
- Mirphak
- mirror blank
- Mirzam
- missing mass
- Maria Mitchell
- Mittenzwey eyepiece
- mixing ratio
- MJD -> Modified Julian Date
- MK classification -> Morgan–Keenan classification
- MKK classification -> Morgan–Keenan classification
- M magnitude
- MMT Observatory
- mock Moon -> [[]]
- mock Sun -> [[]]
- Modified Julian Date
- molecular hydrogen
- molecular line
- Molonglo Radio Observatory
- MONET -> Monitoring Network of Telescopes
- Monitoring Network of Telescopes
- monocentric eyepiece
- Monoceros (constellation)
- monochromatic light
- monochromatic magnitude
- Monogem Ring
- mons (planets)
- Monthly Notices of the Royal Astronomical Society
- Mont Mégantic Observatory -> Observatoire du Mont-Mégantic
- Mopra Observatory
- Moreton wave
- William Wilson Morgan
- Morgan–Keenan classification
- Morgan's classification
- MOST -> Microvariability and Oscillations of Stars
- Mount Graham International Observatory
- Mount Palomar Observatory -> Palomar Observatory
- Mount Stromlo and Siding Spring Observatories
- Mount Wilson classification -> [[]]
- Mount Wilson Observatory
- [[]] -> Ellerman bomb
- moving cluster
- MRAO -> Mullard Radio Astronomy Observatory
- M region
- [[]] -> Magdalena Ridge Observatory
- MSSSO -> Mount Stromlo and Siding Spring Observatories
- MS star
- M star
- MSX -> Midcourse Space Experiment
- Mu Cephei star
- Mullard Radio Astronomy Observatory
- Johann Müller -> Regiomontanus
- multi-beam receiver
- Multi-Element Radio-Linked Interferometer Network
- multi-ringed basin -> impact basin
- mural circle
- Musca (constellation)
N
[edit]- Nagler eyepiece
- Nal detector
- Nançay Radio Astronomy Observatory
- Naos
- narrow-band photometry
- [[]] -> National Aeronautics and Space Administration
- NASA Infrared Telescope Facility
- Nasir Eddin -> al-Tusi
- Nasser Eddin -> al-Tusi
- Nasmyth focus
- National Aeronautics and Space Administration
- National Astronomy and Ionosphere Center -> Arecibo Observatory
- National Optical Astronomy Observatory
- National Radio Astronomy Observatory
- National Solar Observatory
- National Space Science Data Center
- The Nautical Almanac
- [[]] -> near-Earth asteroid
- near-Earth asteroid
- Near-Earth Asteroid Tracking
- NEAR Shoemaker
- near ultraviolet
- NEAT -> Near-Earth Asteroid Tracking
- nebula filter
- nebular line
- nebular variable
- negative eyepiece
- negative lens -> diverging lens
- Neptune (planet)
- Nereid (moon)
- Neumann lines
- neutral hydrogen
- neutral hydrogen line -> 21-centimetre line
- neutral point
- neutron degeneracy
- Simon Newcomb
- New Horizons
- New Millennium Program
- new Moon
- New Style date
- New Technology Telescope
- Isaac Newton
- Newtonian–Cassegrain telescope
- Newtonian focus
- Newton's law of gravitation
- Newton's laws of motion
- N galaxy
- nickel–iron meteorite -> [[]]
- night sky brightness
- Nix Olympica -> [[]]
- NLC -> noctilucent clouds
- N magnitude
- NOAO -> National Optical Astronomy Observatory
- Nobeyama Radio Observatory
- noctilucent clouds
- nodal line
- nodical month -> [[]]
- non-baryonic matter
- non-gravitational force
- non-radial pulsation
- non-thermal radiation
- Nordic Optical Telescope
- Norma (constellation)
- normal astrograph
- North America Nebula
- Northern Coalsack -> Great Rift
- [[]] -> Cygnus (constellation)
- [[]] -> aurora (astronomy)
- North Galactic Spur
- north polar distance
- North Polar Sequence
- nova-like variable
- [[]] -> north polar distance
- [[]] -> National Radio Astronomy Observatory
- [[]] -> New Style date
- NSO -> National Solar Observatory
- NSSDC -> National Space Science Data Center
- N star -> [[]]
- NTT -> New Technology Telescope
- Nubecula Major -> [[]]
- Nubecula Minor -> [[]]
- nuclear time-scale
- cometary nucleus
- galactic nucleus
- null geodesic
- number evolution -> galaxy evolution
- nutation in right ascension -> equation of the equinoxes
- Nysa family
O
[edit]- OAO -> Orbiting Astronomical Observatory
- OB association
- objective grating
- objective prism
- oblate spheroid -> [[]]
- oblique rotator
- obliquity of the ecliptic
- Observatoire du mont Mégantic
- occulting bar
- occulting disk
- OC star
- Octans (constellation)
- Oe star
- off-axis guider
- Of star
- o.g. -> [[]]
- OH–IR source
- OH line
- OH maser
- [[]] -> Haute-Provence Observatory
- Heinrich Wilhelm Matthäus Olbers
- Old Style date
- Oljato (asteroid)
- O magnitude
- Omega Centauri
- Omega Nebula
- Onsala Space Observatory
- ON star
- Jan Hendrik Oort
- Oort's constants
- Oosterhoff group
- Ootacamund Radio Astronomy Centre
- open universe
- Ophelia (moon)
- Ophiuchid meteors
- Ophiuchus (constellation)
- Ernst Julius Öpik
- Oppenheimer–Volkoff limit
- Opportunity (Mars rover)
- opposition (astronomy)
- opposition effect
- optical depth
- optical glass
- optical interferometer
- optical libration
- optical pathlength
- optical pulsar
- optical thickness -> optical depth
- optical wedge
- orbital elements
- orbital velocity
- Orbiting Astronomical Observatory
- Orbiting Solar Observatory
- ordinary chondrite
- organic molecule
- Orgueil meteorite
- Orientale Basin
- Orion (constellation)
- Orion Association
- Orionid meteors
- Orion Molecular Clouds
- Orion Spur
- Orion variable
- [[]] -> Roque de los Muchachos Observatory
- orthoscopic eyepiece
- [[]] -> Old Style date
- oscillating universe
- osculating elements
- OSO -> Orbiting Solar Observatory
- O star
- [[]] -> Teide Observatory
- overcontact binary
- overtone mode
- OVV quasar -> optically violently variable quasar -> [[]]
- Owens Valley Radio Observatory
- Owl Nebula
P
[edit]- [[]] -> position angle
- [[]] -> polycyclic aromatic hydrocarbon
- pair annihilation
- Pallas (asteroid)
- Palomar Observatory
- Palomar Observatory Sky Survey
- Pan (moon)
- Pandora (moon)
- parabolic antenna
- parabolic comet
- parabolic orbit
- parabolic velocity
- parallactic angle
- parallactic ellipse
- parallactic inequality
- parallactic motion
- Paranal Observatory
- parent isotope
- Paris Observatory
- Parkes Observatory
- parselene
- William Parsons -> Third Earl of Rosse
- partial eclipse
- pascal (unit)
- Paschen–Back effect
- Paschen series
- Pasiphae (moon)
- past light cone -> [[]]
- [[]] -> optical pathlength
- Paul Wild Observatory
- Pavo (constellation)
- Cecilia Helena Payne-Gaposchkin
- P-class asteroid
- P Cygni line profile
- P Cygni star -> S Doradus star
- Peacock (star)
- peculiar galaxy
- peculiar motion
- peculiar star
- peculiar velocity
- pedestal crater
- Peekskill meteorite
- Pegasus (constellation)
- Pelican Nebula
- penumbral eclipse
- Arno Allan Penzias
- perfect cosmological principle
- periastron effect
- time of perihelion passage
- orbital period
- period–age relation
- period–colour relation
- period–density relation
- periodic orbit
- periodic perturbation
- period–luminosity–colour relation
- period–luminosity relation
- period–mass relation
- period–radius relation
- period–spectrum relation
- Perseid meteors
- Perseus (constellation)
- Perseus A
- Perseus Arm
- Perseus Cluster
- personal equation
- Petzval surface
- Pfund series
- [[]] -> Potentially Hazardous Asteroid
- Phad
- Phaethon (asteroid)
- phase angle
- phased array
- phase defect
- phase difference
- phase rotator
- phase-switching interferometer
- [[]] -> inflationary universe
- [[]] -> Phad
- Pherkad
- Phillips bands
- Phobos (moon)
- Phobos probes
- Phocaea group
- Phoebe (moon)
- Phoenicid meteors
- Phoenix (constellation)
- Phoenix (Mars lander)
- Pholus (asteroid)
- photocentre
- photoconductive cell
- photodissociation region
- photoelectric magnitude
- photoelectric photometer
- photographic amplification
- photographic emulsion
- photographic magnitude
- photographic zenith tube
- photometric binary
- photometric parallax
- photometric standard -> [[]]
- photon sphere
- photovisual magnitude
- photovoltaic detector
- physical albedo -> geometrical albedo
- physical double
- physical libration
- Giuseppe Piazzi
- Pic du Midi Observatory
- Edward Charles Pickering
- William Henry Pickering
- Pickering Series
- Pico Veleta
- Pictor (constellation)
- pincushion distortion
- Pinwheel Galaxy
- Pioneer
- Pioneer Venus
- Pipe Nebula
- Pisces (constellation)
- Piscid meteors
- Piscis Austrinid meteors
- Piscis Austrinus (constellation)
- pitch angle
- Planck (spacecraft)
- Planck's law
- planetary aspect -> [[]]
- planetary migration
- planetary precession
-> Giuseppe Piazzi
- planoconcave lens
- planoconvex lens
- John Stanley Plaskett
- Plaskett's Star
- plasma tail -> cometary tail
- Plateau de Bure
- plate centre
- plate constants
- plate-measuring machine
- plate scale
- PLC relation -> period–luminosity–colour relation
- Plössl eyepiece
- Plough (asterism)
- PL relation -> period–luminosity relation
- Plutino
- P magnitude
- Pockels cell
- Norman Robert Pogson
- Pogson ratio
- Pogson scale
- Pogson step method
- (Jules) Henri Poincaré
- Pointers
- point-spread function
- [[]] -> AM Herculis star -> DQ Herculis star
- polar axis
- polar diagram
- polar distance
- polar flattening
- polar motion
- polar orbit
- polar plume -> coronal plume
- polar ring galaxy
- polar sequence
- polar wandering
- polycyclic aromatic hydrocarbon
- John Pond
- Jean Louis Pons
- stellar population
- Population I
- Population II
- Population III
- Porrima
- Portia (moon)
- positional astronomy -> [[]] -> meridian astronomy
- position angle
- position-angle effect
- position circle
- position micrometer -> filar micrometer
- positive lens -> converging lens
- POSS -> Palomar Observatory Sky Survey
- post-nova
- potassium–argon method
- potential hazardous asteroid
- power spectrum
- Poynting–Robertson effect
- PPM Star Catalogue
- p-process
- Praesepe
- precession constant
- precursor pulse
- pre-nova
- pressure broadening
- Príbram meteorite
- primary cosmic ray
- primary minimum
- primary mirror
- prime focus
- prime vertical
- primordial fireball
- primordial galaxy
- Principia
- principle of equivalence -> [[]]
- prismatic astrolabe
- probable error
- prograde motion -> direct motion
- prolate spheroid -> [[]]
- Prometheus (moon)
- prominence spectroscope
- proportional counter
- Prospero (moon)
- Proteus (moon)
- proton–proton reaction
- p-spot
- [[]] <-> Claudius Ptolemaeus
- Publications of the Astronomical Society of the Pacific
- Puck (moon)
- Pulcherrima -> Izar
- pulsating variable
- pulsation mode
- pulse broadening
- pulse profile
- pulse width
- Pup (Sirius B)
- Puppid–Velid meteors
- Puppis (constellation)
- PV Telescopii star
- PZT -> photographic zenith tube
Q
[edit]- Q-class asteroid
- Q magnitude
- [[]] -> quasi-stellar radio source
- Quadrantid meteors
- quantum cosmology
- quantum efficiency
- quasi-stellar radio source
- quiescent prominence
- quiet sun
R
[edit]- radar meteor
- radial pulsation
- radial-velocity spectrometer
- radiation era
- radiation laws -> Planck's law -> Stefan–Boltzmann law -> Wien's displacement law
- radiation temperature
- radiative equilibrium
- [[]] -> free–bound transition
- radiative zone
- radioactive age dating
- radio astrometry
- RadioAstron
- [[]] -> jet (astronomy)
- radio meteor
- [[]] -> radioactive age dating
- radio window
- radius–luminosity relation
- Ramaty High-Energy Solar Spectroscopic Imager
- rampart crater
- Ramsden disk
- Ramsden eyepiece
- Ranger (Moon probes)
- [[]] -> Royal Astronomical Society
- Rasalgethi
- Rasalhague
- Ra-Shalom (asteroid)
- R association
- raster scan
- RAS thread
- RATAN-600
- Rayleigh criterion
- Rayleigh–Jeans formula
- Rayleigh limit -> Rayleigh criterion
- Rayleigh number
- crater rays
- R Canis Majoris star
- R-class asteroid
- R Coronae Borealis star
- Grote Reber
- reciprocity failure
- recombination epoch
- recombination line
- recurrent nova
- recycled pulsar
- [[]] -> Mars (planet)
- redshift–distance relation
- redshift–magnitude relation
- Red Spot -> [[]]
- reduced proper motion
- red variable
- reference frame -> [[]]
- reference star
- reflectance spectrum
- reflection effect
- reflection grating
- reflection variable
- atmospheric refraction
- Regiomontanus
- regression of nodes
- relative orbit
- relative sunspot number
- relativistic beaming
- relativistic velocity
- resonance line
- resonant scattering
- restricted three-body problem
- retardation plate -> [[]]
- Reticulum (constellation)
- reticulum (planets)
- reversing layer
- [[]] -> richest-field telescope
- RGO -> Royal Greenwich Observatory
- RGU photometry
- Rhea (moon)
- RHESSI -> Ramaty High-Energy Solar Spectroscopic Imager
- Rho Cassiopeiae star
- Rho Ophiuchi Nebula
- Richardson–Lucy algorithm
- richest-field telescope
- Rigil Kentaurus -> [[]]
- rille (Moon)
- ring arcs
- ring galaxy
- Ring Nebula
- rise time
- George Willis Ritchey
- Ritchey–Chrétien telescope
- R magnitude
- Robertson–Walker metric
- Roche lobe
- [[]] -> Royal Observatory, Edinburgh
- Ole Christensen Römer
- Olaus Christensen Römer -> Ole Christensen Römer
- Ronchi test
- Rood–Sastry type
- Roque de los Muchachos Observatory
- Rosalind (moon)
- Rosat
- Rosetta
- Rosette Nebula
- Frank Elmore Ross
- Third Earl of Rosse <-> William Parsons
- Rosseland mean opacity
- Bruno Benedetto Rossi
- Rossiter effect
- Rossi X-ray Timing Explorer
- rotating variable
- rotation curve
- rotation effect -> Rossiter effect
- rotation measure
- Royal Astronomical Society
- Royal Greenwich Observatory
- Royal Observatory, Edinburgh
- RR Lyrae star
- RRs variable -> Delta Scuti star
- RR Telescopii star
- RS Canum Venaticorum star
- R star -> [[]]
- Rubin–Ford effect
- runaway star
- Henry Norris Russell
- Russell–Vogt theorem -> Vogt–Russell theorem
- RV Tauri star
- RW Aurigae star
- RXTE -> Rossi X-ray Timing Explorer
- Martin Ryle
- Ryle Telescope
S
[edit]- SAAO -> South African Astronomical Observatory
- Sabik
- Sachs–Wolfe effect
- Sacramento Peak Observatory
- Carl Edward Sagan
- Sagitta (constellation)
- Sagittarius (constellation)
- Sagittarius A
- Sagittarius Arm
- Sagittarius Dwarf Galaxy
- Saha ionization equation
- Sakigake
- Salpeter function -> [[]]
- Salpeter process -> triple-alpha process
- [[]] -> South African Large Telescope
- SAMPEX -> Solar, Anomalous, and Magnetospheric Particle Explorer
- Allan Rex Sandage
- SAO -> Smithsonian Astrophysical Observatory
- SAO Catalog -> Smithsonian Astrophysical Observatory Star Catalog
- [[]] -> Small Astronomy Satellite
- Saturn (planet)
- Saturn Nebula
- scattered-disk object
- scatter ellipse
- Scheat
- Schechter function
- Schedar -> Shedir
- Christoph Scheiner
- Giovanni Virginio Schiaparelli
- schiefspiegler telescope
- Maarten Schmidt
- Schmidt–Cassegrain telescope
- Schönberg–Chandrasekhar limit -> Chandrasekhar–Schönberg limit
- Schröter effect
- (Samuel) Heinrich Schwabe
- Karl Schwarzschild
- Schwarzschild telescope
- Comet 29P/Schwassmann–Wachmann 1
- S-class asteroid
- Sco-Cen Association
- Scorpius (constellation)
- Scorpius X-1
- Scotch mount
- SC star -> S star
- [[]] -> Schmidt–Cassegrain telescope
- Sculptor (constellation)
- Sculptor group
- Scutum (constellation)
- [[]] -> Solar Dynamics Observatory
- S Doradus star
- SDSS photometry
- Search for Extraterrestrial Intelligence
- Seashell Galaxy
- (Pietro) Angelo Secchi
- Secchi classification
- secondary cosmic ray
- secondary crater
- secondary minimum
- secondary mirror
- second contact
- secular acceleration
- secular parallax
- secular perturbation
- secular variable
- segmented mirror
- selected areas -> Kapteyn Selected Areas
- selective absorption
- Selene (Moon probe)
- semidetached binary
- semi-forbidden line -> forbidden line
- semiregular variable
- Serpens (constellation)
- Serrurier truss
- [[]] -> Search for Extraterrestrial Intelligence
- setting circle
- Sextans (constellation)
- Carl Keenan Seyfert
- Seyfert galaxy
- Seyfert's Sextet
- Shack–Hartmann test -> Hartmann test
- shadow bands
- shadow transit
- Shapiro delay
- Harlow Shapley
- Shapley Concentration -> [[]]
- shatter cone
- Shaula
- Shedir
- shell burning
- shell galaxy
- shell star
- shock metamorphism
- Eugene Merle Shoemaker
- Comet Shoemaker–Levy 9 (D/1993 F2)
- short-period variable
- Sickle (asterism)
- side lobe
- sidereal month
- sidereal rate
- [[]] -> stony-iron meteorite
- siderophyre
- Siding Spring Observatory
- Sigma Octantis
- Sikhote–Alin meteorite
- silicon star
- SIMBAD
- SIM PlanetQuest
- single-lined binary
- Sinope (moon)
- sinuous rille
- SiO maser
- Willem de Sitter
- SI units
- six-colour system
- 61 Cygni
- [[]] -> Square Kilometre Array
- sky brightness
- Skylab
- Earl Carl Slipher
- Vesto Melvin Slipher
- Sloan Digital Sky Survey
- slow nova
- slow pulsator
- [[]] -> Submillimeter Array
- Small Astronomy Satellite
- SMART-1
- Smithsonian Astrophysics Observatory
- Smithsonian Astrophysics Observatory Star Catalog
- [[]] -> Solar Maximum Mission
- George Fitzgerald Smoot III
- SNC meteorites
- SNU -> solar neutrino unit
- SOAR -> Southern Astrophysical Research telescope
- [[]] -> Stratospheric Observatory for Infrared Astronomy
- soft gamma-ray repeater
- SO galaxy -> [[]]
- [[]] -> Solar and Heliospheric Observatory
- Sojourner
- Solar, Anomalous, and Magnetospheric Particle Explorer
- solar activity
- Solar and Heliospheric Observatory
- solar antapex
- solar atmosphere
- solar cycle -> sunspot cycle
- Solar Dynamics Observatory
- solar dynamo
- solar interior
- solar irradiance
- solar maximum
- Solar Maximum Mission
- solar minimum
- solar motion
- solar neutrino unit
- Solar Orbiter
- solar oscillations -> [[]]
- solar parallax
- solar–terrestrial relations
- Solar Terrestrial Relations Observatory
- solar tower
- solid Schmidt telescope
- solstitial colure
- Sombrero Galaxy
- Sothic cycle
- source count
- South African Astronomical Observatory
- South Atlantic Anomaly
- Southern African Large Telescope
- Southern Astrophysical Research Telescope
- Southern Reference Stars
- Southern Sky Survey
- South Pole Aitken Basin
- curvature of space -> curvature of spacetime
- [[]] -> interstellar absorption
- Space Telescope Science Institute
- Spacewatch
- spark chamber
- Special Astrophysical Observatory
- special theory of relativity
- speckle interferometry
- spectral classification
- spectral index
- spectroscopic binary
- spectroscopic parallax
- spectrum binary
- spectrum variable -> Alpha2 Canum Venaticorum
- Harold Spencer Jones
- spherical albedo -> Bond albedo
- spherical astronomy
- spherical coordinates
- spin casting
- Spindle Galaxy
- spin-down
- spin–orbit coupling
- spin temperature
- Spirit (Mars rover)
- Lyman Spitzer, Jr
- Spitzer Space Telescope
- sporadic meteor
- Gustav Friedrich Wilhelm Spörer
- Spörer minimum
- Spörer's law
- Springfield mounting
- Square Kilometre Array
- Square of Pegasus
- SS Cygni
- SS Cygni star
- SS433
- S star
- standard atmosphere
- standard epoch
- standard solar model
- standard star
- star count
- Stark broadening
- star streaming
- static limit
- static universe
- statistical parallax
- steady-state theory
- Stefan–Boltzmann constant
- Stefan–Boltzmann law
- Stefan's law -> Stefan–Boltzmann law
- stellar association
- stellar atmosphere
- stellar evolution
- stellar interferometer
- stellar population
- stellar structure
- Stephano (moon)
- Stephan's Quintet
- step method -> Argelander step method -> Pogson step method
- [[]] -> Solar Terrestrial Relations Observatory
- stereo comparator
- Steward Observatory
- Stokes parameters
- Stonyhurst heliographic coordinates
- stony-iron meteorite
- stony meteorite
- Stratospheric Observatory for Infrared Astronomy
- Strehl ratio
- Bengt Georg Daniel Strömgren
- Strömgren photometry
- Strömgren sphere
- strontium star
- Struve
- Friedrich Georg Wilhelm von Struve
- Otto Struve
- Otto Wilhelm Struve
- STScI -> Space Telescope Science Institute
- Subaru Telescope
- subluminous star
- sublunar point
- Submillimeter Array
- Submillimeter Wave Astronomy Satellite
- submillimetre astronomy
- sub-pulse
- subsolar point
- substellar object
- substellar point
- sudden ionospheric disturbance
- Abd al-Raman al-Sufi
- Summer Time
- Sunflower galaxy
- [[]] -> Kreutz sungrazer
- sunskirter
- sunspot cycle
- Sunyaev–Zel'dovich effect
- supergalactic plane
- supergiant elliptical
- [[]] -> SU Ursae Majoris star
- superior conjunction
- superluminal velocity
- supermassive star
- [[]] -> SU Ursae Majoris star
- Supernova 1987A
- super-rotation
- super-Schmidt telescope
- superstring theory
- supersynthesis
- surface brightness
- surface gravity
- surface temperature
- surge prominence
- Surveyor (space probes)
- SU Ursae Majoris star
- S Vulpeculae star
- Swan bands
- Swan Nebula -> Omega Nebula
- SWAS -> Submillimeter Wave Astronomy Satellite
- Swift (satellite)
- Comet 109P/Swift–Tuttle
- Sword Hand of Perseus
- Sword of Orion
- SX Arietis star
- SX Phoenicis star
- Sycorax (moon)
- synchronous rotation
- syndyname
- Syrtis Major
- Systems I, II, and III
T
[edit]- [[]] -> Temps Atomique International -> International Atomic Time
- cometary tail
- tangential velocity
- Tarantula Nebula
- Tarazed
- T association
- Taurid meteors
- Taurus A
- Taurus Molecular Clouds
- Taurus Moving Cluster
- Taurus X-1
- [[]] -> Barycentric Coordinate Time
- T-class asteroid
- TDB -> Temps Dynamique Barycentrique -> Barycentric Dynamical Time
- T dwarf
- Teapot (asterism)
- Comet Tebbutt (C/1861 J1)
- technetium star
- Teide Observatory
- telecompressor
- tele-extender
- telescope drive -> [[]]
- telescope mounting -> [[]]
- Telescopio Nazionale Galileo
- Telescopium (constellation)
- telluric lines
- Comet 55P/Tempel–Tuttle
- temperature minimum
- Tenma
- terrestrial age
- Terrestrial Dynamical Time -> Terrestrial Time
- Terrestrial Time
- Tethys (moon)
- Thalassa (moon)
- Thales of Miletus
- Tharsis Montes
- Thebe (moon)
- Themis family
- Themisto (moon)
- [[]] -> grand unified theory
- thermal bremsstrahlung -> free–free transition
- thermal equilibrium
- [[]] -> thermal equilibrium
- thinned chip
- Third Cambridge Catalogue
- third contact
- third quarter -> [[]]
- 30 Doradus -> Tarantula Nebula
- Thirty Meter Telescope
- William Thomson -> Lord Kelvin
- Thomson scattering
- three-body problem
- three-colour photography -> [[]]
- three-colour photometry -> Johnson photometry
- three-kiloparsec arm
- Thule (asteroid)
- tidal bulge
- tidal evolution
- tidal friction
- tidal heating
- time of perihelion passage
- TiO bands
- tip–tilt mirror
- Tisserand parameter
- Titan (moon)
- Titania (moon)
- Titius–Bode law -> [[]]
- TLP -> lunar transient phenomenon
- [[]] -> Thirty Meter Telescope
- [[]] -> Galileo National Telescope
- Toby Jug Nebula
- Tolman test
- Clyde William Tombaugh
- topocentric coordinates
- Toro (asteroid)
- torquetum
- total magnitude -> integrated magnitude
- total solar irradiance
- Toutatis (asteroid)
- TRACE -> Transition Region and Coronal Explorer
- train (meteors)
- transfer lens
- transfer orbit
- transient lunar phenomenon -> lunar transient phenomenon
- meridian transit
- planetary transit
- transit circle
- transit instrument
- transition probability
- transition region
- Transition Region and Coronal Explorer
- transmission grating
- atmospheric transparency
- transverse velocity -> [[]]
- Trapezium (star)
- Triangulum (constellation)
- Triangulum Australe (constellation)
- Trifid Nebula
- trigonometric parallax
- triple-alpha process
- triplet (lens)
- trischiefspiegler -> schiefspiegler telescope
- Triton (moon)
- tropical month
- tropical period
- true equator
- true equinox
- true pole
- Trumpler classification
- Trumpler star
- [[]] -> Terrestrial Time
- T Tauri wind
- Tucana (constellation)
- Tully–Fischer relation
- Tunguska event
- tuning-fork diagram
- atmospheric turbulence
- turnoff point
- Nasir al-Din al-Tusi
- Comet 41P/Tuttle–Giacobini–Kresák
- 21-centimetre line
- two-colour diagram
- two-colour photometry -> BV photometry
- Two-Micron All-Sky Survey
- two-spectrum binary -> composite-spectrum binary
- Tycho Brahe
- Tycho Catalogue
- Tychonic system
- Tycho's Star
- Type I supernova -> [[]]
- Type II supernova -> [[]]
U
[edit]- UBV photometry -> Johnson photometry
- UBVRIJKL photometry -> Johnson photometry
- U-class asteroid
- U Geminorum star
- UKIDSS -> UKIRT Infrared Deep-Sky Survey
- UKIDSS photometry
- UKIRT -> United Kingdom Infrared Telescope
- UKIRT Infrared Deep-Sky Survey
- UKST -> United Kingdom Schmidt Telescope
- ultra-compact dwarf galaxy
- ultra-luminous infrared galaxy
- ultraviolet excess star
- ultraviolet photometry
- ultraviolet radiation
- Ulugh Beg
- Ulysses (spacecraft)
- U magnitude
- Umbriel (moon)
- Undina family
- unfilled aperture
- unit distance
- United Kingdom Infrared Telescope
- United Kingdom Schmidt Telescope
- unsharp masking
- upper culmination -> [[]]
- Upsilon Sagittarii star
- Uranometria
- Urca process
- Harold Clayton Urey
- Ursa Major Moving Cluster
- Ursid meteors
- US Naval Observatory
- USNO CCD Astrograph Catalog
- [[]] -> Universel Temps Coordonné -> [[]]
- Utopia Planitia
- UU Herculis star
- uvby system -> Strömgren photometry
- UV Ceti star
- UV Persei star
- UXor -> UX Orionis star
- UX Orionis star
- UX Ursae Majoris star
V
[edit]- Valhalla (impact basin)
- James Alfred Van Allen
- Van Allen Belts
- Van Biesbroeck's Star
- Hendrik van de Hulst
- van Maanen's Star
- variation of latitude -> latitude variation
- Vatican Advanced Technology Telescope
- VBLUW photometry -> Walraven photometry
- V-class asteroid
- Vega (star)
- Vega probes
- Veil Nebula
- Vela (constellation)
- Vela pulsar
- Vela Supernova Remnant
- velocity curve
- velocity dispersion
- velocity–distance relation
- Venus (planet)
- Venus Express
- VERITAS -> Very Energetic Radiation Imaging Telescope Array System
- vertical circle
- Very Energetic Radiation Imaging Telescope Array System
- Very Large Array
- Very Large Telescope
- Very Long Baseline Array
- very slow nova -> RR Telescopii star
- Very Small Array
- Vesta (asteroid)
- Viking (space probes)
- VILGEN photometry
- Vilnius photometry
- violent relaxation
- Virginid meteors
- Virgo (constellation)
- Virgo A
- Virgo Cluster
- [[]] -> local supercluster
- Virtual Observatory
- Visible and Infrared Survey Telescope for Astronomy
- VISTA -> Visible and Infrared Survey Telescope for Astronomy
- visual magnitude
- VLA -> Very Large Array
- VLBA -> Very Long Baseline Array
- VLBI Space Observatory Programme
- [[]] -> Very Large Telescope
- VLT
- V magnitude
- Hermann Carl Vogt
- Vogt–Russell theorem
- Voigt profile
- von Zeipel theorem
- Voyager (space probes)
- [[]] -> VLBI Space Observatory Programme
- Vulcan (hypothetical planet)
- Vulpecula (constellation)
- VV Cephei star -> Zeta Aurigae star
- VV Sculptoris star
W
[edit]- walled plain
- Walraven photometry
- Washington Double Star Catalog
- Water Jar
- water maser -> H2O maser
- water of hydration
- wave plate
- WC star -> Wolf–Rayet star
- [[]] -> Washington Double Star Catalog
- weird terrain
- Carl Friedrich von Weizsäcker
- Werner lines
- Comet West (C/1975 V1)
- Westerbork Radio Observatory
- Wezen
- Fred Lawrence Whipple
- Whipple Observatory -> Fred Lawrence Whipple Observatory
- Whirlpool Galaxy
- white-light corona
- WHT -> William Herschel Telescope
- Wide Field Infrared Survey Explorer
- Wielen dip
- Wien's displacement law
- Wild Duck Cluster
- Wild's Triplet
- Rupert Wildt
- Wilkinson Microwave Anisotropy Probe
- William Herschel Telescope
- Robert Woodrow Wilson
- Wilson–Bappu effect
- Wilson effect
- Comet 107P/Wilson–Harrington
- Wind (satellite)
- [[]] -> Wide Field Infrared Survey Explorer
- WIYN Telescope
- WMAP -> Wilkinson Microwave Anisotropy Probe
- W. M. Keck Observatory
- WN star -> Wolf–Rayet star
- Maximilian ('Max') Franz Joseph Cornelius
- (Johann) Rudolf Wolf
- Wolf diagram
- Wolf–Lundmark–Melotte system
- Wolf–Rayet star
- Wolf sunspot number
- Wolf 359
- Wolter telescope
- Richard van der Riet Woolley
- Wright telescope
- wrinkle ridge
- WR star -> Wolf–Rayet star
- W Serpentis star -> Algol star
- W Ursae Majoris star
- W Virginis star
- Wyoming Infrared Observatory
- WZ Sagittae star
X
[edit]- XMM-Newton
- X-ray background
- X-ray bright point -> coronal bright point
- X-ray burst
- X-ray calorimeter
- X-ray nova
- X-ray pulsar
- X-ray source
- X-ray Timing Explorer
- X-ray transient
- XTE -> Rossi X-ray Timing Explorer
- [[]] -> extreme ultraviolet
- XUV
Y
[edit]- Yale Bright Star Catalogue -> Bright Star Catalogue
- Yarkovsky effect
- Y dwarf
- Yepun
- Yerkes Observatory
- Yerkes system
- Y magnitude
- Yohkoh
- yoke mounting
- YY Orionis star
Z
[edit]- [[ ]] -> zero-age main sequence
- Z Andromedae star
- Zanstra method
- [[]] -> Zodiacal Catalogue
- Z Camelopardalis star
- [[]] -> zenith distance
- Zelenchukskaya
- zenithal attraction
- zenithal hourly rate
- zenith distance
- zenith telescope
- zero-age horizontal branch
- zero-age main sequence
- Zeta Aurigae star
- [[]] -> zenithal hourly rate
- zirconium star -> S star
- Z magnitude
- Zodiacal Catalogue
- zodiacal dust
- Zond
- zone catalogue
- zone time
- Zürich relative sunspot number -> relative sunspot number
- Fritz Zwicky
- Zwicky Catalogue
- ZZ Ceti star
Feature entries
[edit]- Big Bang theory
- galaxy evolution
- redshift survey
- Search for Extraterrestrial Intelligence
- stellar evolution
Notes
[edit]- The list might contain errors
- When you click a red link, please check the spelling of the title before you create the article
Sources
[edit]- Ridpath, Ian (2007) Oxford Dictionary of Astronomy, Oxford University Press
Blue links
[edit]- VLT
- double pulsar
- binary pulsar
- XUV
- Alpha Crucis
- Beta Crucis
- Gamma Crucis
- Becrux
- Acrux
- LHA
- standard star
- shell star
- runaway star
- reference star
- guide star
- barium star
- Be star
- Ae star
- daughter isotope
- megaregolith
- parselene
- siderophyre
- solar minimum
- solar maximum
- sunskirter
- tangential velocity
- velocity curve
- velocity dispersion
- vertical circle
- violent relaxation
- visual magnitude
- walled plain
- wave plate
- zodiacal dust
- gravitational mass
- inertial mass