Seventh planet in terms of distance to the Sun, which rotates outside the orbit of Saturn and into the orbit of Neptune. It is of sixth magnitude, so it is poorly observable to the naked eye.
Uranus was accidentally discovered in 1781 by British astronomer William Herschel and was originally called Georgium Sidus (George Star) in honor of his royal patron, George III. Later, for a while he was called Herschel in honor of his discoverer. The name Uranus, which was first proposed by the German astronomer Johann Elert Bode, began to be used at the end of the 19th century.
Uranus has a diameter of 52,200 km and its average distance to the Sun is 2,870 million kilometers. It takes 84 years to complete an orbit and 17 hours and 15 minutes in a complete rotation on its axis, which is inclined 8 ° in relation to the plane of the planet's orbit around the Sun.
The atmosphere of Uranus is mainly composed of hydrogen and helium, with some methane. Through the telescope, the planet appears as a bluish green disk with a pale green outline.
In comparison with the Earth, Uranus has a mass 14.5 times greater, a volume 67 times greater and a gravity 1.17 times greater. However, the magnetic field of Uranus is only one tenth stronger than that of the Earth, with an axis inclined 55 ° in relation to the axis of rotation. The density of Uranus is approximately 1.2 times that of water.
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