What is Trinity?

A system consisting of three stars is called triplet ~ two stars are called binary stars.

For example, a- Nanmener Centauri, which is the closest to the earth except the sun, is a three-in-one star. The nearest to the earth is the star C, also called proxima centauri.

According to the number of star members, they can be called triads and quartets. Kaiyang in the famous Big Dipper looks like two stars, but it is actually a combination of seven stars.