Thursday, February 9, 2012



Streaks

Streaks
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Streaks

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Streaks

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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