optical double star
1optical double (star) — or optical double n. DOUBLE STAR (sense 2) * * * …
2optical double (star) — or optical double n. DOUBLE STAR (sense 2) …
3optical double (star) — or optical double n. DOUBLE STAR (sense 2) …
4optical double star — noun also optical double or optical pair : double star 2 compare physical double star …
5optical double star. — See under double star. * * * …
6optical double star. — See under double star …
7double 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… …
8optical double — noun see optical double star …
9double 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 …
10physical double star — noun also physical double : binary star compare optical double star …
