noun
1. : binary star
2. : two stars in very nearly the same line of sight but seen as physically separate by means of a telescope — called also optical double star
noun
1. : binary star
2. : two stars in very nearly the same line of sight but seen as physically separate by means of a telescope — called also optical double star
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012