Each star is a huge glowing ball of gas, as our Sun. A star shines because allocates a huge amount of energy. This energy is the result of the so-called thermonuclear reactions.
Many of the stars is much more Sun. And our Earth is a speck of dust compared to the Sun! Take a soccer ball and imagine that it is the Sun. Then our Earth will be a small as a pin head!
Why do we see the Sun so small? Yes, because it is very far from us. Why do stars look tiny? Remember how small we think our huge Sun - just with a soccer ball. This is because it is very far from us. And the stars are much, much more!
I know that flies faster than anything in the world? The beam of light. He can fly around the whole Land before you have time to blink. Now, the Sun is so far away that its beam is flying to the us in 8 minutes. And rays from other closest stars are flying to the us 4 years! The light from the most distant stars flies to Earth millions of years! Do you see now how far away are the stars?
But if the star is the sun, why they Shine so poorly?
You certainly know the story of the crane and the Fox. Treating crane porridge, sly Fox smeared on her plate. And how many crane nor knocked beak, to taste him and failed.
What would happen if the Fox you've gotten this portion of oatmeal is not on the plate and around the forest? Here it is not that the crane - fly hadn't had lunch!
It works and with the light of distant stars. The farther the star, the more divergent rays. Like the porridge in the story. Only they are not smeared on the plate and across the sky. And comes to us a tiny portion of these rays.