shilong-d1

universe

There are billions of galaxies in the know universe. galaxies We live in the Milky Way, which is 100,000 light years across. nebulae a cloud of gas, is forming star. star star use nuclear power to creat energy. when it runs out of fuel, it gone supernova. supernova solar system a supernova is a massive star run out fuel.release a lot of radiation and energy. there are 8 planets in solar system. __//** chick here to next page **//__