binary star
nounUK /ˈbaɪ.nər.i stɑː/
US /ˈbaɪ.nɚ.i stɑːr/
Two stars that circle around each other in space.
The astronomer studied a binary star through the telescope.
OTHER MEANINGS
2. A pair of stars that appear close together in the sky but may not truly orbit each other.
Through a small telescope, the binary star looked like one bright point.
3. A system of two stars bound by gravity, often exchanging material between them.
The binary star system flared brightly when gas flowed from one star to the other.
4. In science fiction, a planet or setting lit by two suns.
The desert world orbited a binary star, so it had two shadows.