What is a binary system?

Answer:
A binary system [See Link] is an astronomical term referring to two objects in space (usually stars, but also planets, galaxies or asteroids) which are so close that their gravitational interaction causes them to orbit about a common center of mass.
First answer by Cosmospup. Last edit by Cosmospup. Contributor trust: 856 [recommend contributor recommended]. Question popularity: 3 [recommend question].