PDA

View Full Version : The Tilted Planet


wet1
08-26-01, 11:07 PM
From APOD:

http://antwrp.gsfc.nasa.gov/apod/image/0108/uranus_vg2_big.jpg

Uranus: The Tilted Planet
Credit: Voyager 2 Team, NASA
Uranus is the third largest planet in our Solar System after Jupiter and Saturn. Uranus is composed mostly of rock and ices, but with a thick hydrogen and helium atmosphere. The blue hue of Uranus' atmosphere arises from the small amount of methane which preferentially absorbs red light. This picture was snapped by the Voyager 2 spacecraft in 1986 - the only spacecraft ever to visit Uranus. Uranus has many moons and a ring system. Uranus, like Venus, has a rotation axis that is greatly tilted and sometimes points near the Sun. It remains an astronomical mystery why Uranus' axis is so tilted. Uranus and Neptune are quite similar: Uranus is slightly larger but less massive.