How to sign: of or pertaining to a number system have 2 as its base
"a binary digit";
How to sign: a system of two stars that revolve around each other under their mutual gravitation
Similiar / Same: binary star, double star
Categories: star
Within this category: Aldebaran, Algol, Alpha Centauri, Altair, Antares, Epsilon Aurigae, Procyon, Rigel, Sirius, Vega