"About Uranus: If the Sun were as tall as a typical front door, Earth would be the size of a nickel and Uranus would be about as big as a baseball; Uranus orbits our Sun, a star. Uranus is the seventh planet from the Sun at a distance of about 2.9 billion km (1.8 billion miles) or 19.19 AU.; One day on Uranus takes about 17 hours (the time it takes for Uranus to rotate or spin once). Uranus makes a complete orbit around the Sun (a year in Uranian time) in about 84 Earth years; Uranus is an ice giant; Most (80 percent or more) of the planet's mass is made up of a hot dense fluid of "icy" materials – water (H2O), methane (CH4). and ammonia (NH3) – above a small rocky core; Uranus has an atmosphere which is mostly made up of hydrogen (H2) and helium (He), with a small amount of methane (CH4); Uranus has 27 moons; Uranus' moons are named after characters from the works of William Shakespeare and Alexander Pope; Uranus has faint rings; The inner rings are narrow and dark and the outer rings are brightly colored; Voyager 2 is the only spacecraft to have visited Uranus; Uranus cannot support life as we know; Like Venus, Uranus has a retrograde rotation (east to west). Unlike any of the other planets, Uranus rotates on its side, which means it spins horizontally."