The colour of a star depends on it's temperature and age. Protostars are stars that are about to be born. These are glowing clouds of interstellar gas and dust, which look like dark spots in the midst of light. Gravity causes every atom and every bit of dust to pull on every other one and all move to the center, causing the protostar to collapse. The protostar shrinks at a very fast rate. Because the atoms move faster and faster as they fall toward the center, friction is created as they rub together and the temperature rises. The heat created causes the protostar to glow with its own light. A star is born when a protostar stops shrinking in size.

Star Colours:

Blue Giants

are the largest and hottest

are white in colour

The Sun

is yellow, and slightly cooler

Orange Stars

even cooler

Red Stars

the coolest of stars

a large, luminous star with a cool surface

The tiniest stars are called dwarfs. When a star no longer lets off any light at all, it is called a black hole.

A group of stars that appear to form a picture in the sky are called constellations. They look like certain shapes. For details and background about constellations, be sure to visit:

Constellation Families

Mythology, Sky, Constellations, Stars.