optical double star.

See under double star.

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Universalium. 2010.

Look at other dictionaries:

  • optical double (star) — or optical double n. DOUBLE STAR (sense 2) * * * …   Universalium

  • optical double (star) — or optical double n. DOUBLE STAR (sense 2) …   English World dictionary

  • optical double star — noun also optical double or optical pair : double star 2 compare physical double star …   Useful english dictionary

  • optical double star. — See under double star …   Useful english dictionary

  • double star — Astron. two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star), or those… …   Universalium

  • optical double — noun see optical double star …   Useful english dictionary

  • double star — n. 1. BINARY STAR 2. two stars, along the same line of sight, that look like one star, or a binary star, but actually are very distant and physically unrelated; optical double …   English World dictionary

  • Double star — For other uses, see Double star (disambiguation). In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope. This can happen either because… …   Wikipedia

  • double star — noun a) Two stars which form a stellar system, such that they orbit the point of equilibrium of their gravitational fields; a binary star. b) Two stars that appear to be one when seen with the naked eye, either because they orbit one another… …   Wiktionary

  • double star — /ˈdʌbəl sta/ (say dubuhl stah) noun two stars so near to each other in the sky that they appear as one under certain conditions; optical double stars are two stars at greatly different distances but nearly in line with each other and the… …   Australian English dictionary

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