APOD: Martian Chiaroscuro (2014 Mar 22)

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APOD: Martian Chiaroscuro (2014 Mar 22)

Post by APOD Robot » Sat Mar 22, 2014 4:10 am

Image Martian Chiaroscuro

Explanation: Deep shadows create dramatic contrasts between light and dark in this high-resolution close-up of the martian surface. Recorded on January 24 by the HiRISE camera onboard the Mars Reconnaissance Orbiter, the scene spans about 1.5 kilometers across a sand dune field in a southern highlands crater. Captured when the Sun was just 5 degrees above the local horizon, only the dune crests are caught in full sunlight. With the long, cold winter approaching the red planet's southern hemisphere, bright ridges of seasonal frost line the martian dunes.

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by Nitpicker » Sat Mar 22, 2014 4:30 am

Just beautiful. There is a black dot in the top left corner, which would be about 6m in diameter if it were real and on the surface. But I assume it is some kind of alignment marker, or similar, applied by the camera or the post-processing. (The lighting is all wrong for it to be a party balloon: http://asterisk.apod.com/viewtopic.php?f=23&t=33136.)

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by Chris Peterson » Sat Mar 22, 2014 5:24 am

Nitpicker wrote:Just beautiful. There is a black dot in the top left corner, which would be about 6m in diameter if it were real and on the surface. But I assume it is some kind of alignment marker, or similar, applied by the camera or the post-processing. (The lighting is all wrong for it to be a party balloon: http://asterisk.apod.com/viewtopic.php?f=23&t=33136.)
It's a bit odd, since it's not present in any of the original images. The artifact seems to have been added in the process of moving the image over to the APOD filesystem.
Chris

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by Boomer12k » Sat Mar 22, 2014 5:46 am

Looks like a giant Fingerprinted painting or something....

Very surreal...

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Jandotto

Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by Jandotto » Sat Mar 22, 2014 10:06 am

I presume the frost is carbon dioxide not water?

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by neufer » Sat Mar 22, 2014 1:23 pm

Jandotto wrote:
I presume the frost is carbon dioxide not water?
You presume correctly. (NASA refers to it as dry ice "frost").
Art Neuendorffer

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by Lordcat Darkstar » Sat Mar 22, 2014 1:34 pm

Clearly the dot is a hole caused by a camera shy sand wurm. :lol2: These Mars pictures are always my favorite APODs. Keep up the great work! :mrgreen:

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by hannahrjr » Sat Mar 22, 2014 1:47 pm

Have you noticed how much the dunes look like giant fingerprints?

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by henrystar » Sat Mar 22, 2014 2:09 pm

Lordy me, I remember the first flyby of Mars - looked lunar, nothing but craters. Then our second mission flew by (we did two at a time in those days) and showed non-cratered terrain in the other hemisphere, and we cheered up. We've come a LONG way, baby!

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by retrogalax » Sat Mar 22, 2014 2:43 pm

These dunes have rich colors making this extraterrestrial desert pretty cool and smooth ! :)

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by Psnarf » Sat Mar 22, 2014 3:12 pm

Have they tried a cortisone ointment on that?

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Re: APOD: Martian Chiaroscuro (2014 Mar 22)

Post by zbvhs » Sun Mar 23, 2014 3:33 am

And people want to go live there?
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