This graphic shows clouds of water on Mars.
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Image from: NASA/JPL
Mars Global Surveyor Measures Water Clouds
This graph, taken by Mars Global Surveyor, shows proof that the clouds of Mars are made of water. The sequence shows the water clouds moving across the face of Mars. The Mariner 9 mission was the first to provide scientists with proof that the clouds of Mars contained water. Compare these clouds with those of the planets Jupiter or Venus.
Mars Pathfinder took images of Martian clouds from the ground level. Clouds seem mostly to be found in the equatorial band, as the measurement shows. Clouds are also seen at the north pole. This may be because north polar ice is evaporating with the coming of the spring season.
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