Stars
The Pleiades Star Cluster
They look so small because they are very far away - the nearest star is 41,000,000,000,000 (4.1 x 1013) km away!
All the energy in a star is produced in its centre by nuclear fusion. This energy emerges from the star as heat and light so that the star appears to glow, i.e. it is luminous
Stars come in lots of different sizes and colours
Stars exist because of a balance between gravity trying to make the star shrink and all the heat from the middle trying to make it grow.
Stars "live" for many millions of years, but they do not change much. However, amazing things can happen when they are "born" or when they run out of nuclear fuel and "die".
