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Whirlwinds on Mars, From the Ground
Neil Halelamien writes "Back in 1999, satellite images were photographed of 5-mile-high whirlwinds streaking across the surface of Mars. A couple of months ago the Spirit rover got a close up view of whirlwind tracks, and this past week photographed a whirlwind in action (animation). It's thought that these dust devils may be responsible for the mystery power boost to the rovers' solar cells. Last year the rovers also spotted clouds and frost."
Not impressive compared to the tornado footage we're used to from the local TV station. But one must remember that the rovers' actions are scripted in advance. So it was a complete coincidence that a whirlwind happened to be in-frame when they took a photo. Which says something about how common they must be if we just happened to snag a picture of one.
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"Now we're assuming they're cleaning, but all we can really say is that overnight the solar panels produced between 2 and 5 percent additional power immediately,'' he said. "We're surmising that for some reason dust is being removed from the solar panel and that's increasing the efficiency of the sunlight being converted to electricity."
Any hardcore space-geeks care to propose any other explanation?
Seriously, i'm just wondering what else might explain this, because enough moving atmosphere on Mars to clean the panels is very interesting to me. Other possibilities anyone?
Will the next batch of rovers be equipped with windsocks, to measure the direction of the wind?
And what do you call those spinning things to measure airspeed? The ones with four arms with little hemispheric "cups" that catch the wind. KnowwhatImeanVerne?
It's not offtopic, dumbass. It's orthogonal.
I don't think that terraforming Mars would help here.
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The link talks about Opportunity's power boost, but a few days ago Spirit also had the same thing happen to it.
Quite amazing stuff, if this keeps up the rovers should last a very long time!
Overnight? While parked and sleeping?
We can't get grasses to grow in Tuscon, let alone Valles Marineris. Even terran algae would have a tough time of it, with so little CO2 and sunlight. So I don't think there's much danger of them obscuring the geography, and even less chance of them covering up any artifacts... since it's already pretty clear that there was never any civilisation capable of creating any artifacts.
Mars is just a huge rock, with some water and vapors clinging to it. An astonishingly fascinating rock, but still just a rock. If we ever undertake terraforming it, that will be so far enough in the future that I think we'll have a pretty good opportunity between now and then to give that big rock a good studying... long enough to make an informed judgment of whether to proceed with Project Genesis or not. Worrying about the introduction of interplanetary kudzu at this point is a bit premature.
http://alternatives.rzero.com/
I don't think that terraforming Mars would help here.
Right. We'd be so preoccupied rewriting all the books about stellar physics to explain how it's possible for our star to go supernova, that we wouldn't have time to move everyone from the "atomize" zone (Earth's orbit) to the "atomize a few minutes later" zone (Mars' orbit).
http://alternatives.rzero.com/
95.3% carbon dioxide (CO2),
2.7% nitrogen (N2),
1.6% argon (Ar),
0.15% oxygen (O2),
0.03% water vapor (H2O)
pressure
1-9 millibars, depending on altitude; average 7 mb
A little shy on the O2 department without a lot of terraforming action, pressure pretty low too, in short, no walking around without a spacesuit of some kind. It would seem possible though, given a large enough power source, you could run oxygen accumulators for inside use in your structures, etc..
taken from http://www.daviddarling.info/encyclopedia/M/Marsa