WordReference Random House Unabridged Dictionary of American English © 2025
dou′ble star′, [Astron.]
- Astronomytwo 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 that are relatively close together and comprise a single physical system (physical double star.) Cf. binary star.
- 1775–85
'double star' also found in these entries (note: many are not synonyms or translations):