exoplanet

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See also: Exoplanet

English[edit]

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Etymology[edit]

Constructed from Ancient Greek: exo- +‎ planet.

Noun[edit]

exoplanet (plural exoplanets)

  1. (astronomy, planetology) A planet which exists outside Earth's solar system.
    • 2007, Alexander Hellemans, "Dangling a COROT", Scientific American, vol. 297, no. 3, p. 32:
      More such announcements will likely come in the months to follow, as the first space observatory dedicated to hunting exoplanets, called COROT, begins full operation and researchers complete their calculations.
    • 2013 May-June, Kevin Heng, “Why Does Nature Form Exoplanets Easily?”, American Scientist, volume 101, number 3, page 184: 
      In the past two years, NASA’s Kepler Space Telescope has located nearly 3,000 exoplanet candidates ranging from sub-Earth-sized minions to gas giants that dwarf our own Jupiter. Their densities range from that of styrofoam to iron.

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