2.1. Basically stars are big exploding balls of gas.
3. space song
4. planets
4.1. There are eight planets in our milky way.The biggest planet is Jupiter Mercury is the smallest planet Uranus is the only planet on its side
5. galaxies
5.1. Galaxies are made up of millions of stars our galaxy is the milky way there are about 1 billion trillions of stars all together there are 500 , 000 , 000 , 000 , 000 galaxies or over !!
