It is a blue-ish colour, made by the methane within the cloud-tops of its cold (around -200°C) atmosphere. When the Voyager 2 spacecraft flew by Uranus in 1986, it showed an almost featureless surface (see left image). When we look at Uranus under a different light, infra-red (right video) we start to see some bands of cold clouds and warmer spots.
Uranus has rings, like Saturn, but they are much thinner and far more difficult to see.
Uranus was the first planet to be discovered in modern times, and was found by the English astronomer William Herschel back in 1781, but only one space-probe has passed by the planet, Voyager 2 in 1986.
Uranus has at least 27 moons, 22 of these are very small and most orbit close to Uranus. The other five (Miranda, Ariel, Umbriel, Titania and Oberon) are larger and further out.
|Facts and Figures||Mercury||Venus||Earth||Mars||Jupiter||Saturn||Uranus||Neptune|
|Orbital Distance (AU)1||0.38||0.72||1.0||1.52||5.2||9.45||19.2||30.06|
|Mass (Earth Masses)2||0.055||0.82||1.0||0.11||318||95.2||14.5||17.1|
|Surface Gravity (g)3||0.38||0.91||1.0||0.38||2.34||0.93||0.92||1.12|
|Surface Temperature||-200 to|
|460 °C||-80 to|
|-110 °C||-140 °C||-190 °C||-200 °C|
|Number of moons||0||0||1||2||63||60||27||13|