Wednesday, September 26, 2012

Uranus (Planet)

Uranus is one of the largest planets of the Solar System. With twenty seven moons and a ring system, it orbits the Sun at a mean distance of 1.78 billion miles (2.87 billion km), between Saturn and Neptune, taking it 84.015 years to complete a revolution around the Sun. Uranus has a diameter of 31,800 miles (51,100 km) and a mass of 14.56 times that of planet Earth. Uranus is composed of a gaseous envelope, which contains hydrogen (H), helium (He), and methane (CH4), and a frozen water liquid core with temperature of -270ยบ C. It was discovered by Sir William Herschel in 1781.