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9/10/2002: Mars dust devil
A few weeks back we had a nice shot of a set of dust devils. Now the Astronomy Pic of the Day shows us that dust devils also occur on MARS.
Astronomers would sometimes notice new dark trails on the surface. Finally they figured out that these were left by dust devils, and in this shot there is actually a dust devil - on top there, climbing that incline. Martian dust devils can be up to 8 kilometers high. Damn.
MaggieL Tuesday Sep 10 03:59 PM
High-resolution image of the source is now available
Slithy_Tove Tuesday Sep 10 11:56 PM
Damn. That's fascinating. I would have thought the Martian atmosphere was too thin to support whirlwinds.
It also must mean that there must be considerable non-circular wind on Mars, because if there weren't, the planet would be covered with dust devil tracks, like the one in the picture. Something must be sweeping them away on a regular basis.
jaxomlotus Thursday Sep 12 09:14 AM
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Originally posted by Slithy_Tove Damn. That's fascinating. I would have thought the Martian atmosphere was too thin to support whirlwinds. It also must mean that there must be considerable non-circular wind on Mars, because if there weren't, the planet would be covered with dust devil tracks, like the one in the picture. Something must be sweeping them away on a regular basis. |
perth Thursday Sep 12 09:35 AM
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Originally posted by jaxomlotus Actually, I think that dark trail is a shadow from the dust devil, not a track left behind by it's movement (which shows just how tall it is) |
~james
edit:
maybe not, i see now what youre referring to. dont mind me.
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