Uranus is the seventh planet from the Sun and stands out in the solar system for its unique tilt—it's tipped over on its side, with an axial tilt of about 98 degrees. This means its poles experience extreme seasons that last over 20 Earth years each. Often called an "ice giant," Uranus is composed mainly of hydrogen, helium, and icy materials like water, ammonia, and methane, the latter of which gives the planet its pale blue color. Unlike Jupiter and Saturn, Uranus has a more subtle appearance, with few visible cloud bands or storms. It also has a faint ring system and at least 27 known moons, many of which are named after characters from the works of William Shakespeare and Alexander Pope. Uranus is one of the least explored planets, having been visited only once—by NASA’s Voyager 2 in 1986—but it remains a mysterious and intriguing world that scientists hope to study more closely in future missions.