Uranus

Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both are of different chemical composition than the larger gas giants Jupiter and Saturn. Astronomers sometimes place them in a separate category called "ice giants". Uranus's atmosphere, while similar to Jupiter's and Saturn's in its primary composition of hydrogen and helium, contains more "ices" such as water, ammonia, and methane, along with traces of hydrocarbons. It is the coldest planetary atmosphere in the Solar System, with a minimum temperature of 49 K (−224 °C). It has a complex, layered cloud structure, with water thought to make up the lowest clouds, and methane thought to make up the uppermost layer of clouds. In contrast, the interior of Uranus is mainly composed of ices and rock.

Like the other giant planets, Uranus has a ring system, a magnetosphere, and numerous moons. The Uranian system has a unique configuration among the planets because its axis of rotation is tilted sideways, nearly into the plane of its revolution about the Sun. Its north and south poles therefore lie where most other planets have their equators. In 1986, images from Voyager 2 showed Uranus as a virtually featureless planet in visible light without the cloud bands or storms associated with the other giants. Terrestrial observers have seen signs of seasonal change and increased weather activity in recent years as Uranus approached its equinox. The wind speeds on Uranus can reach 250 meters per second (900 km/h, 560 mph).

Read more about UranusHistory, Orbit and Rotation, Internal Structure, Atmosphere, Planetary Rings, Magnetic Field, Climate, Formation, Moons, Exploration, In Culture

Other articles related to "uranus":

Uranus - In Culture
... In astrology, the planet Uranus is the ruling planet of Aquarius ... Since Uranus is colored cyan and Uranus is associated with electricity, the color electric blue, a color close to cyan, is associated with the sign Aquarius ... See Uranus in astrology) The chemical element uranium, discovered in 1789 by the German chemist Martin Heinrich Klaproth, was named after the newly discovered planet ...
List Of Eternals - Membership - Uranus
... to space with 24 of his followers, who ultimately arrived upon Uranus, establishing an outpost there ...
Climate Of Uranus - Circulation Models
... solutions have been proposed to explain the calm weather on Uranus ... One proposed explanation for this dearth of cloud features is that Uranus' internal heat appears markedly lower than that of the other giant planets in astronomical terms, it has a ... Why Uranus' heat flux is so low is still not understood ...
Climate Of Uranus
... The climate of Uranus is heavily influenced by both its lack of internal heat, which limits atmospheric activity, and by its extreme axial tilt, which induces intense seasonal variation ... Uranus' atmosphere is remarkably bland in comparison to the other gas giants which it otherwise closely resembles ... When Voyager 2 flew by Uranus in 1986, it observed a total of ten cloud features across the entire planet ...
Climate Of Uranus - Seasonal Variation
... Determining the nature of this seasonal variation is difficult because good data on Uranus' atmosphere has existed for less than 84 Earth years, or one full Uranian year ... Uranus is an oblate spheroid, which causes its visible area to become larger when viewed from the poles ... Uranus is also known to exhibit strong meridional variations in albedo (see above) ...