Planet

The Earth
====Planet Earth is the only planet that has water. planets are satellites to the sun. there are 9 planets. a year on mercury lasts only 88 days. iron oxide, or rust, gives mars its reddish color. jupiter is 1,500 times bigger than earth. Winds on saturn can blow at 500 meters per second. Also, a day on uranus lasts only 17 hours. Neptune takes 165 earth years to orbit the sun. Pluto sometimes moves inside neptune's orbit. Asteroids may be planet's that never fully formed, or they may be pieces of planet's that broke apart. Most are the size of a house, or smaller. Halley's comet was first reported more than 2,200 years ago. It crosses earth's orbit and can be seen in the sky once every 76 years. It will next appear in 2061. Pluto is the ninth and farthest planet from the sun. It is dark and cold. From distant pluto the sun is just a small point of light. Pluto is made up of a mixture of rocky materials and frozen gasses. ====