Exploratour - The Atmosphere of Mars
This image of Martian clouds illustrates the fact that they are found mostly in the equatorial region.
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Image from: Hubble
Click on image for full size
Image from: Hubble
Clouds on Mars
On Mars, clouds only cover 30% of the sky at any time.
The picture shows that most of the clouds of Mars are found near the equator of Mars. Scientists have also seen clouds as they flow around the big volcanoes of Mars.