What term describes two stars that orbit each other?

What term describes two stars that orbit each other?

• A. Binary star
• B. Multiple star system
• C. Red supergiant
• D. Neutron star

Answer: (A)

The term that describes two stars that orbit each other is "binary star." In astronomy, a binary star system consists of two stars that are gravitationally bound to each other and revolve around a common center of mass. This system can provide valuable insights into stellar masses and evolution, as their orbits and interactions can be studied over time.

The other terms refer to different astronomical concepts. A multiple star system involves three or more stars that are gravitating towards each other and can include binary stars as subsystems within a larger grouping. Red supergiants are a type of star that is in a particular stage of stellar evolution, characterized by their large size and brightness, while neutron stars are the remnants left after a massive star undergoes a supernova explosion, resulting in a dense core made predominantly of neutrons.