Friday, February 10, 2012



mars reconnaissance orbiter

mars reconnaissance orbiter
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mars reconnaissance orbiter

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mars reconnaissance orbiter

Dry Ice Pits on Mars

by Father Sky

Part of Mars is defrosting. Around the South Pole of Mars, toward the end of every Martian summer, the warm weather causes a section of the vast carbon-dioxide ice cap to evaporate. Pits begin to appear and expand where the carbon dioxide dry ice sublimates directly into gas. These ice sheet pits may appear to [...]

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Seasonal Dark Streaks on Mars

by Father Sky

What is causing these dark streaks on Mars? A leading hypothesis is flowing -- but quickly evaporating -- water. The streaks, visible in dark brown near the image center, appear in the Martian spring and summer but fade in the winter months, only to reappear again the next summer. These are not the first markings [...]

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Slope Streaks in Acheron Fossae on Mars

by Father Sky

What creates these picturesque dark streaks on Mars? No one knows for sure. A leading hypothesis is that streaks like these are caused by fine grained sand sliding down the banks of troughs and craters. Pictured above, dark sand appears to have flowed hundreds of meters down the slopes of Acheron Fossae. The sand appears [...]

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A Dark Dune Field in Proctor Crater on Mars

by Father Sky

Was this image taken with a telescope or a microscope? Perhaps this clue will help: if the dark forms were bacteria, they would each span over football field across. What is actually being seen are large sand dunes on the floor of Proctor Crater on Mars. The above picture was taken by HiRISE camera on [...]

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