Stars, Universe and Space

The whole world and everything beyond it is the universe. It is all the is the stars and planets, the Earth and its plants and animals, you and me, and everything. It all started about 15 billon years ago, there was a gigantic explosion which they call the Big Bang.

Milky Way is the galaxy we live in. It is made up of all the stars can be seen in the night and lots and lots that we cant be seen. The milkly way got its name because at night we can sometimes see part of it looking like a band of milky white light across the sky.

Stars are made of gases like the air around us. The two main gases in stars are called hydrogen and helium. They are star's fuel.Stars make heat and light from them. Since earliest times, people have seen patterns in the way stars are grouped in the sky. The patterns are called constellations.

The biggest star we can see in the sky is called sirius. Another name for it is the Dog Star. It is about twice as big our sun, but it gives out more than twenty times as much as light.

Stars only twinkly when we look at them at from earth. Out in the space their light shines steadily. We see them twinkling because the air around the earth- as the light from a star travels toward us, it is bent and wrobbled by bubbles of hot and cold air.