Uranus is the seventh planet from the sun. Uranus has 27 moons. These known moons are Ariel, Umbriel, Titania, Oberon, and Miranda. It is mainly made of hydrogen and helium, with a small amount of methane, traces of water, and ammonia. It is one of the coldest planets in the Solar System, with a temperature of -372 degrees Farenheit. Its wind speed can reach 560 miles per hour. A powerful collision with another celestial Solar System bodies can explain why Uranus spins on its side. It is classified as Neptune's brother because of their similarities in mass, size, and composition. Like the other gas giants, Uranus also has rings. Its rings were the second most visible rings, but not as great as Saturn's. Uranus' rings are mainly made of dust particles.