Uranus is the seventh planet from the sun in the Solar System. Uranus is a gas giant and is primarily composed of hydrogen and helium, with small amounts of methane, ammonia, and water. The planet is known for its unique tilt of its axis, which causes its seasons to be very extreme.
Examples of spacecraft that have studied Uranus include NASA's Voyager 2, which flew by the planet in 1986, and the Hubble Space Telescope, which has been used to study Uranus and its moons. The Uranus orbiter and probe mission has been proposed by NASA and other space agencies, which would involve sending a spacecraft to orbit Uranus and study the planet and its moons in more detail. However, it is not yet funded or scheduled.