Planets of our Solar System: Uranus

today lets see some stuff about Uranus!
Uranus was named after the god of sky. It is third largest planet but fourth in mass.
It is special type of gas giant: the ice giant. The difference between him and Saturn and Jupiter is that there is only 83% of hydrogen in its atmosphere.

Uranus was discovered by William Herschel. It is actually the first discovered planet. It is called discovered because it was not known in ancient times and it took a guy and telescope to find him. Some people found Uranus before William but they did not notice the strange movement and marked him as star. Uranus lies right on the edge of visibility by naked eye with apparent magnitude about +5.7 or so.

The interior of Uranus is very specific. There is outer atmosphere as you can see on the picture. There is lot of methane which makes Uranus look blue, methane absorbs red light very well. To see some cool stuff with methane, click here.
It continues to mantle where is water, ammonia etc… by astronomers those things are considered to be ice stuff, which is as strange as that everything else than hydrogen and helium to be considered metal.
Very important is that ice giants don`t have metallic hydrogen inside. The inner core is made up of mostly rock, it is about half the size of Earth.

Because of low inner heat of Uranus there are not many features in the atmosphere while sometimes some clouds and storms appear there. Speaking of storms, there can be winds which have the speed of 900km|h, which is hella lot!

Uranus has magnetosphere. Also very strange because its center is moved by third of his radius. Uranus has probably the strangest rotational axis of all planets in Solar System. It is turned by about 90° as you can see on the next picture.
Astronomers are not very sure why this is, maybe because of some huge impact. On the picture you can see the planetary rings of Uranus. There is 13 of them and they are really thin.
Uranus also has 27 found natural satellites which are named after Shakespear`s characters.

It takes 84.07 years him to go around Sun. Day there is shorter than on Earth with little over 17 hours. The usual distance from Sun is almost 3 billions kilometers or about 20 astronomical units.

Under the thick atmosphere there is a huge pressure which can brake methane molecules appart and form diamonds.
There was only one mission to go around him and it was Voyager 2 so we dont know so much stuff about him.


Picture are taken from Uran czech wikipage.