The ancient scientists and astronomers discovered that besides the Moon and Sun, there were five more tiny moving lights in the night sky. And those were only can be seen with the bare eye. The named these lights Planets. Planets means wanderers. They ware named after the ancient Roman Gods- Mercury, Mars, Saturn, Venus and Jupiter. But during 15th century, after inventing the telescope, mankind discovered the more distant Planets like- Neptune, Uranus and Pluto. The early cultures believed that the Planets have some connection with the human, and they can influence their daily life. During the second century, some astronomer(specially Ptolemy) described some solar system having the Earth at the center.