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Uranus is the third largest planet in the solar system. It is 3 billion km from the Sun lying between Saturn and Neptune.
天王星在太阳系中是第三大行星。它在土星和海王星之间，距离太阳约30亿公里。
It is named after the Greek God of the sky.
它以希腊神的名字而命名。
Uranus was the first Planet to be discovered in modern times.
天王星是在现代第一颗被发现的行星。
Although it is just possible to see Uranus with the naked eye under ideal circumstances, it was the musician and mathematician Sir William Herschel who formally identified Uranus In March 1781.
在最理想的情况下可以用肉眼看到天王星,在1781年3月音乐家,数学家威廉•赫歇尔爵士正式确认天王星。
Uranus is a giant gas planet. It is 51200km in diameter, but is made of 83% hydrogen and 15% helium.
天王星是一颗巨大的气体行星。直径51200公里,但是却由83%的氢和15%的氦组成。
The strange thing about Uranus is that it is tilted over on one side to 98º. This means that Uranus rolls around the Sun on its side.
奇怪的是, 天王星的自转轴可以说是躺在轨道平面上的，倾斜的角度高达98°。这意味着天王星将面对太阳。
For one half of a Uranus' year, about 42 years, the ‘North' of Uranus is facing the sun and is in constant sunlight while the ‘South' is in darkness.
天王星在前42年，在至日前后时，北部一个极点会持续的指向太阳，南部另一个极点则背向太阳。
Then for next 42 years the situation is reversed and the "Southern" hemisphere gets all the light.
然后另一个42年情况逆转,南半球会指向太阳。
Uranus has a faint ring system, also discovered by Herschel.
天王星有微弱的环系统,也是被赫歇尔发现。
It has over 27 satellites, most of them not much bigger than large rocks, but 5 of them have been given names taken from Shakespeare.
它有超过27个卫星,但它们大多数都不比岩石大,但5颗已经被命名，这些命名全部取自莎士比亚。
Uranus has only ever been visited once by a space craft, NASA's Voyager 2 flew past in 1986. There are currently no plans to visit Uranus in the near future.
天王星只有一个人类访客,美国宇航局的航行者2号在1986年曾经抵达。目前在不久的将来还没有计划去参观天王星。
