Stars

Stars are celestial bodies that emit light. There are pseudo-stars and real stars. Artificial star is a star that does not produce its own light, but reflect light received from another star. Real star is the star that produces its own light. In general, the star designation is the object space that produce their own light (real star).

According to the science of astronomy, the definition of a star is:
"All massive objects (with mass between 0.08 to 200 solar masses) which was and never creates a generation of energy through nuclear fusion reactions. "

Therefore, white dwarfs and neutron stars which emit no light or energy still referred to as a star. The nearest star to Earth is the Sun at a distance of about 149,680,000 kilometers, followed by Proxima Centauri in the constellation Centaurus is about four light years.


Ref :
http://id.wikipedia.org/wiki/Bintang