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Astronomy Picture of the Day -- Valles Marineris: The Grand Canyon of Mars
NASA ^ | May 11, 2014 | (see photo credit)

Posted on 05/12/2014 8:54:54 PM PDT by SunkenCiv

Explanation: The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the Valles Marineris remains unknown, although a leading hypothesis holds that it started as a crack billions of years ago as the planet cooled. Several geologic processes have been identified in the canyon. The above mosaic was created from over 100 images of Mars taken by Viking Orbiters in the 1970s.

May 11, 2014

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; mars; science
[Credit: Viking Project, USGS, NASA]

1 posted on 05/12/2014 8:54:54 PM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; steelyourfaith; Mmogamer; dayglored; ...
The Big One

2 posted on 05/12/2014 8:56:12 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv

Cabins available...


3 posted on 05/12/2014 8:57:04 PM PDT by GeronL (Vote for Conservatives not for Republicans!)
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To: SunkenCiv

Does that look like that missing airliner just to the left?


4 posted on 05/12/2014 8:58:48 PM PDT by Mastador1 (I'll take a bad dog over a good politician any day!)
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To: SunkenCiv

Talk about your epic crack.


5 posted on 05/12/2014 9:09:38 PM PDT by fieldmarshaldj (Resist We Much)
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To: GeronL

Well, people are crazy about non-waterfront property...


6 posted on 05/12/2014 9:41:47 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: Mastador1

Give Malaysia time, they’ll saddle on that idea.


7 posted on 05/12/2014 9:42:22 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: fieldmarshaldj

:’)


8 posted on 05/12/2014 9:42:25 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv

A little Bondo and that’ll buff right out!


9 posted on 05/12/2014 10:29:55 PM PDT by TigersEye ("No man left behind" is more than an Army Ranger credo it's the character of America.)
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To: SunkenCiv

Whatever it was, it left a mark.


10 posted on 05/13/2014 4:56:34 AM PDT by left that other site (You shall know the Truth, and The Truth Shall Set You Free.)
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