optical double
Look at other dictionaries:
optical double — noun see optical double star … Useful english dictionary
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) — 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. * * * … Universalium
optical double star. — See under 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 quasar — A pair of quasars may be referred to as a double quasar, if they appear close to each other in the sky. This pairing may result in a chance alignment, physical proximity, actual close physical interaction, or effects of gravity bending the light… … Wikipedia
