Most scientists think that the Sun and all of the planets in the Solar System formed at the same time, from a huge rotating gas cloud known as the Solar Nebula. The solar nebula contained hydrogen and helium atoms from the Big Bang, tiny, dust grains, matter ejected from dead stars. Visit http://earthfacts.com/ to learn more facts about the earth and you may also like our Facebook Page - https://www.facebook.com/Earthfacts.com. Marcia Malory is a Freelance Science writer from York, England.
