This forms the basis for the classification of stars.

A group of stars is known as a star cluster.

Stars may be classified according to temperature.

From our solar system, certain groups of stars all seem to be of the same distance away from Earth.

Betelguese is about 640 light-years away, while Mintaka is about 9000 light-years away from Earth.

Some stars are fainter than other stars visible to the naked eye.

The Supernova that appeared in 1054 was four times brighter than Venus.

The Pleiades, another star cluster, is useful for astronomers.

The star patterns that we see only at night are called constellations.