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#14
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01-20-2011, 04:10 AM
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Re: 2010 NASA Space Photos...Beautiful.....
Thanks for sharing these spectacular images this one, comes from Hirise's database; though i see why they looks like forests or anyway like 3d objects, there's to say that they are actually almost flat features. Basically, they're streaks. During Martian winter, a layer of carbon dioxide ice covers the dunes, but when it evaporates (in Martian spring) causes some sort of dark avalanches streaking down the slopes, and the visual result is the spectacle that we see in this false-not-so-false-color photo: they're most likely just basaltic sand along ordinary sand dunes. Slope streaks on Mars can be very spectacular, and it's almost always hard to determine their causes: for example, these ones are still debated: someone say that they are just small scale dry avalanches, but geochemical weathering can't be ruled out so far. And this one, For humans, Mars is definately the most interesting planet in our solar system, its poles may contain secrets that could reveal to us many secrets about the evolution (and end) of life on a planet. This is why we sent probes to the poles. |
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#15
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01-20-2011, 06:22 AM
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Re: 2010 NASA Space Photos...Beautiful.....
Forgot to add the description to the last one ![]() It's a possible result of the transit of a dust devil: <iframe title="YouTube video player" class="youtube-player" type="text/html" width="640" height="390" src="http://www.youtube.com/embed/bY59iEWeMFw" frameborder="0" allowFullScreen></iframe> The dust devil removes the thin layer of dust, and the result turns into drawings following its path. |