This is an image of Uranus.
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NASA

A Look at the History of Uranus' Atmosphere

The giant planets have definitely changed since their formation. But how much remains to be seen.

Most of the original air of the giant planets remains in place. (The earth-like planets lost most of their atmospheres very soon after they formed because the atmosphere drifted away).

Unlike Jupiter or Saturn, which are made of simple molecules, Uranus is made mostly of icy material. The reason for this is because the cloud from which the planets formed told what kind of material was to form near Uranus.


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The position of Uranus when gas changed to ice

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Uranus' Smog

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Uranus' Mesosphere

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An Overview of Uranus' Atmospheric Structure

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Altitude Changes of the Belts & Zones

On Uranus, as on Jupiter, the winds in the belts and zones blow first in one direction, then in the other direction. The clouds rise up in a belt, and drop down in a zone, as shown in this picture. This...more

Why Uranus looks like a "bullseye"

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Uranus Clouds, Overview

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