What is Pluto?
When astronomers first defined the planets they called them similar bodies that revolve around the sun ,give no light of their own, and they were formed in the same gas and dust that formed the sun.
According to astronomers (The Week, September 30, 2005) Pluto is only one sixth the size of the earth and it is made of ice and dirt.Perhaps it is not big enough to be called a planet. Pluto has a"twin", or an asteroid of the same size that is twice as far away called Sedna. The Astronomers in the know are now saying that we could actually have a 20 planet solar system! Wow!