What is the solar system? Find out about the solar system and learn the order of the planets with a song in this video! The Sun is a star. The Earth is one of eight planets that travel around the Sun.

An international team including astronomers from the Center for Astrophysics | Harvard & Smithsonian (CfA) has announced the ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets ...