Question

what is the name of the star nearest to earth besides sun?

Answer 1

Outside of our Sun, our system's nearest neighbor is Alpha Centauri. This isn't a single star, it's actually a triple-star system — three stars bound together by gravity. Alpha Centauri A and B are two bright, closely orbiting stars with a distant, dim companion named Proxima Centauri

Answer 2

A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. The nearest star to Earth is the Sun.