Noun
a system of two stars that revolve around each other under their mutual gravitation
Source: WordNet3 Centauri is a double star with a blue-white hued primary of magnitude 4.6 and a secondary of magnitude 6.1. Source: Internet
Also called Hadar and Agena, Beta Centauri is a double star; the primary is a blue-hued giant star of magnitude 0.6, 525 light-years from Earth. Source: Internet
Eta Sagittarii (η Sgr) is a double star with component magnitudes of 3.18 and 10, while Pi Sagittarii (π Sgr) is actually a triple system whose components have magnitudes 3.7, 3.8, and 6.0. Source: Internet
“Jupiter orbits the sun in 12 years and 60 years, so Jupiter laps … a conjunction like this happens every 20 years, but some of those conjunctions happen when Jupiter and are further apart, so then it does not look like a double star. Source: Internet
A rare double star system has been spotted in the Milky Way. Source: Internet
For example, the total or combined magnitude of the double star Alpha Centauri is 0.27, while its two component stars have magnitudes of +0.01 and +1.33. Source: Internet