Uranus is the seventh planet from the Sun. Its name is a reference to the Greek god of the sky, Uranus, who, according to Greek mythology, was the great-grandfather of Ares, grandfather of Zeus and father of Cronus. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both have bulk chemical compositions which differ from that of the larger gas giants Jupiter and Saturn. For this reason, scientists often classify Uranus and Neptune as "ice giants" to distinguish them from the other giant planets. As with gas giants, ice giants also lack a well defined "solid surface." Uranus's atmosphere is similar to Jupiter's and Saturn's in its primary composition of hydrogen and helium, but it contains more "ices" such as water, ammonia, and methane, along with traces of other hydrocarbons.

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See the moon 'jump' over Uranus in the predawn sky this week

Spot Uranus near Venus in the predawn sky on Sunday

Scientists discover why Neptune and Uranus are different colours despite similarities

Haze Layers are Responsible for Different Blue Hues of Neptune and Uranus, Scientists Say

Uranus and Neptune are slightly different shades of blue because, although both condense methane in their upper atmospheres into falling snow, Neptune’s more active atmosphere means the methane snow falls more efficiently than it does on Uranus, giving Neptune a bolder blue color.

New Discovery Reveals Why Uranus and Neptune Are Different Colors

This Is Why Uranus Is A Different Color To Neptune Say Scientists

Why are Uranus and Neptune Different Colors? Haze

Gemini north telescope helps explain why Uranus and Neptune are different colors. Observations from Gemini observatory, a program of NSF’s NOIRLab, and other telescopes reveal that excess haze on Uranus makes it paler than Neptune

Why Uranus and Neptune are different colors

Shades of Uranus: Scientists know why the planet and Neptune are different hues of blue

Conversation with concept study lead on the Uranus Orbiter and Probe, which was recommended to NASA as the top flagship mission priority (WeMartians Podcast)

How Uranus and Neptune are key to unlocking how planets form

Did a 5th Giant Planet Mess up the Orbits of Jupiter, Saturn, Uranus and Neptune?

Uranus: Facts about the sideways ice giant

Traveling to the centre of planet Uranus: Materials synthesis research and study in terapascal range

Why Is Uranus So Much Fun To Joke About?

Planetary Decadal Survey Says it’s Time for a Mission to Uranus (and Enceladus too!)

NASA’s New Uranus Orbiter May Not Arrive Until 2053 And Six Other Jaw-Dropping Facts About The Mission To The Seventh Planet

Remember Uranus? | You know, the seventh planet from the sun? It could use some attention.