asterism

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English

WOTD – 14 April 2010
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The "Summer Triangle", an asterism easily seen overhead during clear summer nights (in the northern hemisphere).
An asterism (mineralogy)

Etymology

From (deprecated template usage) [etyl] Ancient Greek ἀστερισμός (asterismós, “group of stars”), from ἀστήρ (astḗr, “star”).

Pronunciation

  • Lua error in Module:parameters at line 229: Parameter 1 should be a valid language or etymology language code; the value "UK" is not valid. See WT:LOL and WT:LOL/E. IPA(key): /ˈastəɹɪzəm/

Noun

asterism (plural asterisms)

  1. (astronomy) An unofficial constellation (small group of stars that forms a visible pattern).
    The Big Dipper, Summer Triangle, and Orion's Belt are asterisms.
    • 1825, Geo G. Carey, Astronomy, as it is known at the present day, London, p. 66 f.:
      Of the constellations, or asterisms. [...] It therefore became necessary to adopt a more general method of distinguishing them. This was accomplished by portioning out the heavens into imaginary figures, of men, birds, fishes, &c. called Constellations or Asterisms.
    • 2007, Matilde Battistini and Rosanna M. Giammanco Frongia (translation from Italian into English), Astrology, Magic, and Alchemy in Art, page 60:
      Like Pisces and Capricorn, Aquarius is located in that part of the sky known as "Astral Sea," a region inhabited by water asterisms such as Eridanus, Cetus (the Whale), and the Dolphin.
  2. A rarely used typographical symbol (⁂, three asterisks arranged in a triangle), used to call attention to a passage or to separate subchapters in a book.
  3. (mineralogy) A star-shaped figure exhibited by some crystals by reflected light (as in a star sapphire) or by transmitted light (as in some mica).

Translations

See also

Anagrams

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