Uranus
Uranus rotates practically on its side and is the coldest planet in the solar system. Its pale blue-green appearance comes from methane in the atmosphere.
astronomy.planets.ice-giants
Metrics
Diameter
Equatorial diameter.
Mass
Corresponds to ~14.5 Earth masses.
Orbital Period
About 84 Earth years.
Distance from Sun
Mean distance (19.19 AU).
Relations
Both ice giants of similar size, but with different internal heat.
Explanations
Uranus is remarkable for its extreme tilt – it essentially rotates on its side, making it unique in our Solar System. Its distinctive pale blue-green appearance comes from methane in its atmosphere. At a temperature of just 76 Kelvin (roughly −197°C), Uranus is the coldest planet in our Solar System, even though it's not the farthest from the Sun – that's Neptune, its comparison planet.
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Provenance
Status
seed
Review
none
Last Updated
2026-02-17