NASA's Mars Global Surveyor shows clouds high in the atmosphere over the landing site in Meridiani Planum on Mars of NASA's Mars Exploration Rover, Opportunity on April 29, 2004.

4 May 2004
In recent weeks, the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) blue wide angle images have been showing clouds high in the atmosphere over the Mars Exploration Rover (MER-B), Opportunity, landing site in Meridiani Planum. This view of the sunward limb of Mars shows an example. It was acquired by the MOC blue camera late last week on 29 April 2004. The "x" shows the location of the rover site. The bright features in this image are water ice clouds. The dark portion of the image on the left is outer space. Clouds can also be seen in a zone approximately 20 to 40 kilometers (12-25 miles) above the martian limb. North is approximately up, east is toward the right, and sunlight illuminates the scene from the left (west). The image runs along the limb from about latitudes 4°S to about 2°N.

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