Space/Science — HabitableZone

Space/Science » in reply to Mars rover finds "puddles" on the planet's surface

No sale.
podrock — (archived)

I've not read the thread over at Doug's place, nor have I read the article. Fact is, I've been pretty much offline for the last ten days, so this is the first I've seen of this.

Things that come to mind:

What are the filters used in this color image and how are they weighted?

Wind is a very effective sorting agent. Minerals with slightly different specific gravities (densities) are easily separated by various wind strengths into various layers. Particle size also plays a role in eolean transport and deposition. There are charts for all this, I'll have to see if I can dig one up.

So the dust in these cracks probably has a very concentrated mineral composition, hence the intense refectivity in certain wavelengths.

Does particle size affect refectivity at different wavelengths?

Was the wind blowing when the pictures were taken? If so, the dust is in motion, and each individual photo is actually slightly different than the one before, and when the pictures are combined there is a strange look to the resulting image . . . ?

What is the reflectivity of moving dust?

Sorry, I'm not buying it. At least until I catch up on my reading.

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