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Uranus is the 7th planet from the Sun. The planet is classed as a gas planet. Uranus derives its name from the Roman god for Father of Saturn. Uranus has been known for centuries ever since people looked to the stars and noticed a star moving across the sky.The mass of the object is 86832. The equatorial radius of the planet is 25559 whereas the volumetic mean radius is 25362. The Mean Density of the planet is 1270. The surface acceleration of the planet is 8.69. The time the planet takes to revolve round the Sun is 30,685.4 days or roughly 84.1 Earth Years. The length of a day on the planet is 17.24 hours, i.e. the time it takes to revolve once on its axis. The average temperature of the planet is -76K/-197C. The surface pressure of the planet is >1000bars.

Uranus is about 2872500000.0km from the Sun. The Orbit Eccentricity is 0.0457, that is how much the orbit deviates from a circle, between 0 and 1. The Orbit Inclination is 0.772, that is how much the orbit deviates from a circle, between 0 and 1. The volume of Uranus at the equator is 6833. The escape velocity, the speed which is need to break free is 21.3. The surface gravity of Uranus is 8.87 compared to Earth which for purpose of this site is 1. The following gasses can be found in the Uranus's atmosphere : Molecular hydrogen (H2) - 82.5% (3.3%); Helium (He) - 15.2% (3.3%), Methane (CH4) - ~2.3%\n. More information and the source for the moon can be found at N.A.S.A.

It is located twice as far from the Sun as the Saturn which is the closest planet in from Saturn. Uranus is a gas giant with a possible rocky core but surrounding core is an extremely hostile gassy atmosphere, one in which it would be a struggle to get anything into to investigate. The first time Uranus was visited by a space probe was in 1986 by the Voyager 2 space probe which flew past on its way out of the solar system.

Uranus` Planetary Rings

Whilst all the gas giants have a ring, Saturn has the most prominent rings followed by Uranus. It was not until 1977 that the rings were discovered when astronomers were observing the planet crossing the path of a star. The astronomers noticed the star blinked before Uranus has blocked the star, thus they realised the blinking was caused by the planet having rings.

Rotation of Uranus

Uranus is unique amongst all the planets in The Solar System in that it rotates on its side. This is probably caused by a collision with another body that knocked it on its side. Whereas on Earth, the planet rotates east to west, the planet rotates south to north in comparison to our own planet.


Discovery of Uranus

The planet was the first to be discovered since ancient times, everyone believed that the solar system stopped at Saturn. The planet was discovered by Sir William Herschel, a German Born Astronomer who moved to United Kingdom and discovered Uranus. The planet was discovered on March 13th, 1781 by Herschel using a telescope because it was far it couldn`t easily be spotted by the naked eye which the other planets had been discovered. Herschel had wanted to called it George`s Star but that got overruled and became Uranus. The choice of Uranus was because Saturn was the father of Jupiter and so to follow on, Uranus is the father of the Greek God Saturn. The planets name became the inspiration for the newly discovered element Uranium.

Uranus Facts

Position from Sun7 A.U.
MeaningFather of Saturn
Equatorial Radius25559
Volumetric Mean Radius25362
Mean Density1270
Surface Acceleration8.69
Orbital Period30,685.4 Days
Length of Day17.24
Average Temperature-76K/-197C
Surface Pressure>1000bars
Distance from the Sun2872500000.0km from the Sun.
Orbit Eccentricity0.0457
Orbit Escape Velocity21.3
Surface Gravity8.87
AtmosphereMolecular hydrogen (H2) - 82.5% (3.3%); Helium (He) - 15.2% (3.3%), Methane (CH4) - ~2.3%\n

List of Moons in orbit around Uranus

MoonDiscoveredOrbit Circumference
Ariel24 October 1851 1,199,459.64 km
Belinda13 January 1986 473,123.85 km
Caliban6 September 1997 45,059,071.93 km
Cressida9 January 1986 388,300.84 km
Cupid25 August 2003 467,418.52 km
Desdemona13 January 1986 393,955.72 km
Francisco13 August 2001 26,791,931.29 km
Mab25 August 2003 614,092.44 km
Magaret29 August 2003 77,591,859.82 km
Miranda16 February 1948 816,185.43 km
Oberon1787 3,666,236.83 km
Ophelia1986 338,027.09 km
Perdita18 May 1999 (verified in Voyager 2 images dating back to January 18, 1986) 480,126.02 km
Portia1986 415,318.55 km
Prospero18 July 1999 97,014,053.99 km
Puck1986 540,353.94 km
Rosalind1986 439,194.65 km
Setebos13 August 2001 123,084,701.12 km
Stephano18 July 1999 49,670,195.34 km
Sycorax6 September 1997 71,012,648.50 km
Titania1787 2,741,352.92 km
Trinculo13 August 2001 52,790,725.03 km
Umbriel1851 1,671,320.94 km

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