Uranus is the seventh planet from the Sun, and the third largest in terms of both diameter and mass. It is the first of the gas giants in our solar system, and is also the coldest. Uranus is composed mostly of hydrogen and helium, with a small rocky core. The planet's atmosphere is very cold, with temperatures reaching as low as -224°C (-371°F). Uranus also has a very strong magnetic field, which is responsible for the planet's distinctive aurora borealis and aurora australis.

Uranus is a unique planet in our solar system. It is the only planet that rotates on its side, and its axis of rotation is nearly parallel to the ecliptic. This means that Uranus experiences extreme seasons, with each pole spending half of the planet's year in darkness and the other half in sunlight. Uranus also has a very unusual system of rings, which are composed mostly of ice and dust.

Uranus was discovered in 1781 by astronomer William Herschel. The planet is named after the Greek god of the sky, Ouranos. Uranus is a very distant planet from Earth, and it takes approximately 84 years for the planet to orbit the Sun. This means that Uranus has only been visited by one spacecraft, Voyager 2, which flew by the planet in 1986.