The seventh planet from the Sun with the third largest diameter in our solar system, Uranus is very cold and windy. The ice giant is surrounded by 13 faint rings and 27 small moons as it rotates at a nearly 90-degree angle from the plane of its orbit.

Uranus is an ice giant. Most of its mass is a hot, dense fluid of "icy" materials – water, methane and ammonia – above a small rocky core.

Jan 9, 2025 · Uranus is the seventh planet from the Sun, and the third largest planet in our solar system. It appears to spin sideways.

Jan 9, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

All of Uranus's inner moons (those observed by Voyager 2) appear to be roughly half water ice and half rock. The composition of the moons outside the orbit of Oberon remains unknown, but they are likely captured asteroids.

Jan 9, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

Apr 23, 2024 · Information on this site is gathered either directly from scientists and engineers working on active missions or from Websites from global space agencies, including NASA and the European Space Agency.We also rely on information provided by research and development centers, national and international observatories, private observatories and others on the list …

This paper discusses some of the fundamental science that must be done at Uranus if we are to understand our Solar System and systems discovered around other stars. We suggest a Uranus Orbiter should be launched in the next decade.

May 31, 2022 · Neptune and Uranus have much in common — they have similar masses, sizes, and atmospheric compositions — yet their appearances are notably different. At visible wavelengths Neptune has a distinctly bluer color whereas Uranus is a pale shade of cyan.