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19 lines
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Plaintext
19 lines
1.3 KiB
Plaintext
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created: 20230720104606510
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modified: 20230720104721998
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title: Uranus
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type: text/vnd.tiddlywiki
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tags: Planet [[Gas Giant]]
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[img class=hero-image [Uranus Image]]
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Uranus is the seventh planet from the [[Sun]] in our [[Solar System]]. Like [[Neptune]], it is an ice giant. It is the third largest planet in the solar system.
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The planet is made of ice, gases and liquid metal. Its atmosphere contains hydrogen (1H), helium (2He) and methane. The temperature on Uranus is −197 °C (−322.6 °F; 76.1 K) near the top of its atmosphere, but its small solid core (about 55% the mass of [[Earth]]) is probably about 4,730 °C (8,540 °F; 5,000 K).
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The planet is tilted on its axis so much that it is sideways. It has five big moons, many small ones, and a small system of 13 planetary rings.
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The distance between Uranus and the [[Sun]] is about 2.8 billion km. Uranus completes its orbit around the [[Sun]] in 84 earth years. It completes a spin around its axis in 17 hours and 14 minutes. This means there are about 43,000 Uranian days in one Uranian year.
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Uranus was discovered in 1781. This planet can be seen with the naked eye under perfect conditions. John Flamsteed saw it decades earlier but mistook it for a star (34 Tauri).
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Uranus is named after Uranus, the Greek name of the Sumerian god Anu, who was a god of the sky.
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