The sun is a star.

The light from the sun reaches earth 

in around 8 minuets.

                                     mercury is the first planet.A year in mercury is 88 days.

                       Venus is the second planet.One day on venus is 117 earth days long.

Earth is the third planet.The earth has formed opproxmatley 4.54 billion  years ago and is the only known planet to support life.