Uranus

Uranus, the seventh planet in the solar system, was the first to be discovered by telescope. Originaly it was named "Georgium Sidus" but that was later changed. A strange thing about Uranus is that it spins on it's side. Journeying around the sun in this lopsided manner, Uranus exposes each pole to sunlight for 42 years at a time. Uranus was thought to have nine dark rings but Voyager 2 imaged 11. In contrast to Saturn's rings, which are composed of bright particles, Uranus' rings are primarily made up of dark, boulder-sized chunks.

Surrounding the planet's atmosphere and extending thousands of kilometers into space is a mysterious ultraviolet sheen known as "electroglow."
Approximately 8,000 kilometers (5,000 miles) below Uranus' cloud tops, there is thought to be a scalding ocean of water and dissolved ammonia some 10,000 kilometers (6,200 miles) deep. Beneath this ocean is an Earth-sized core of heavier materials. Wind speeds range up to 580 kilometers (360 miles) per hour.

Voyager 2 discovered 10 new moons, 16-169 kilometers (10-105 miles) in diameter, orbiting Uranus. This makes the total number 15.