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Uranus is the seventh planet from the Sun. It is a gaseous cyan-coloured ice giant. Most of the planet is made of water, ammonia, and methane in a supercritical phase of matter, which in astronomy is called 'ice' or volatiles.
- Uranus (Mythology)
In Greek mythology, Uranus (/ ˈ j ʊər ə n ə s / YOOR-ə-nəs,...
- Moons of Uranus
Uranus was the last giant planet without any known irregular...
- Atmosphere of Uranus
True-color image of Uranus by Voyager 2. The atmosphere of...
- Climate of Uranus
Uranus is an oblate spheroid, which causes its visible area...
- Neptune
The NEPTUNE Ocean Observatory project is part of Ocean...
- Supercritical Fluid
A supercritical fluid (SCF) is any substance at a...
- Talk
Uranus is a featured article; it (or a previous version of...
- Uranus (Disambiguation)
Fiction. Uranus, a 1948 novel by Marcel Aymé; Uranus, a...
- Uranus (Mythology)
- History
- Features
- Orbit and Rotation
- Other Websites
Discovery
Uranus has been observed many times through a telescope, and even through the naked eye, but was mistaken for a star due to its slow orbit. Sir William Herschel observed Uranus on 13 March 1781 from the garden of his house at 19 New King Street in Bath, Somerset, England (now the Herschel Museum of Astronomy), and first reported it (on 26 April 1781) as a comet. With a homemade 6.2-inch reflecting telescope, Herschel "engaged in a series of observations on the parallaxof the fixed stars." Her...
Exploring
In 1986, NASA's Voyager 2 visited Uranus. This is the only space probethat tried to investigate the planet from a short distance. The spacecraft studied the atmosphere of the planet.
Moons
Uranus has 27 known moons. They are named for characters from the works of Shakespeare and Alexander Pope. The five biggest moons are Miranda, Ariel, Umbriel, Titania and Oberon. More moons are likely to be discovered.
Clouds
Uranus is covered in blue clouds. The top clouds, made of methane, are difficult to see.Lower clouds are thought to be frozen water. There are also violent storms. Wind speeds can reach 250 metres per second (900 km/h; 560 mph). Scientists are studying the clouds to try to understand the storms on the planet.
Rings
The planet Uranus has a system made of 13 rings, which is far fewer than the rings of Saturn but more than those around Jupiter and Neptune. The rings of Uranus were discovered in 1977. More than 200 years ago, William Herschel also reported observing rings, but modern astronomers do not believe that he saw them, because they are very dark and faint. Two additional rings were discovered in 1986 in images taken by Voyager 2, and two outer rings were found in 2003–2005 by the Hubble Space Teles...
Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is roughly 3 billion km (about 20 AU). The intensity of sunlight on Uranus is about 1/400 that on Earth. Its orbital elements were first calculated in 1783 by Pierre-Simon Laplace. With time, discrepancies began to appear between the predicted and observed o...
Uranus Profile Archived 2007-06-24 at the Wayback Machine by NASA's Solar System ExplorationKeck pictures of Uranus show best view from the ground Archived 2007-11-16 at the Wayback Machine— Press release with some photographs showing rings, satellites and cloudsNews reports of December 22, 2005 rings and moons discoveryUranus is a very cold and windy world. The ice giant is surrounded by 13 faint rings and 28 small moons. Uranus rotates at a nearly 90-degree angle from the plane of its orbit. This unique tilt makes Uranus appear to spin sideways, orbiting the Sun like a rolling ball.
Uranus, seventh planet in distance from the Sun and the least massive of the solar system’s four giant, or Jovian, planets, which also include Jupiter, Saturn, and Neptune. At its brightest, Uranus is just visible to the unaided eye as a blue-green point of light. It is designated by the symbol ♅.
- When was Uranus discovered?Uranus was discovered on March 13, 1781, by the English astronomer William Herschel with the aid of a telescope. Uranus is the first planet to be d...
- How far is Uranus from the Sun?The mean distance of Uranus from the Sun is nearly 2.9 billion km (1.8 billion miles), more than 19 times as far as Earth, and it never approaches...
- What is the average temperature in Uranus's atmosphere?On average, Uranus radiates the same amount of energy as an ideal, perfectly absorbing surface at a temperature of 59.1 kelvins (K; −353 °F, −214 °...
- How many moons and rings does Uranus have?Uranus has 27 known moons that are accompanied by at least 10 narrow rings. Generally, the rings are located closer to the planet than the moons. S...
- What is unusual about the axis of Uranus?Unlike most planets, the axis of Uranus lies almost parallel to its orbital plane, which means that the planet spins nearly on its side, its poles...
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 a very cold and windy planet. It is surrounded by faint rings, and more than two dozen small moons as it rotates at a nearly 90-degree angle from the plane of its orbit. This unique tilt makes Uranus appear to spin on its side.
Jan 18, 2017 · Uranus, the seventh planet from the sun, may initially look like a bland, blue-green ball. But there's a lot to love about the icy giant, from its 13 rings to its 27 known moons to the fact that...
