Uranus

Uranus is the seventh planet of the Sol System. It is named after the ancient Greek god of the sky Uranus, (Ancient Greek: Οὐρανός) who was the father of Cronus (Saturn) and grandfather of Zeus (Jupiter). First discovered in 1781, it was the first planet discovered with a telescope.

As a gas giant, Uranus' atmosphere is similar in composition to Jupiter, Saturn and Neptune -- primarily hydrogen and helium. However, due to the much colder temperatures at the edge of the Sol System, both Neptune and Uranus have atmospheres containing more "ices" such as water, ammonia and methane.