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Scientist: Mars Was Colored By Meteorites


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#1    Starlyte

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Posted 04 September 2003 - 03:58 PM

Sept. 3, 2003 Laboratory evidence is challenging theories that Mars' ruddy surface came from a past when the planet was awash with water, New Scientist said.

Defenders of this hypothesis say Mars' reddish dust came from iron in rocks that over billions of years dissolved into the planet's oceans, lakes and rivers.

The iron oxidized and was then deposited all over the Martian surface thanks to the planet's weather system. It was then left high and dry after the waters mysteriously disappeared, either receding below ground or boiling into space.

But U.S. scientist Albert Yen of NASA's Jet Propulsion Laboratory has assailed this idea, noting a strange discrepancy between Mars' dusty topsoil and its rocks.

The topsoil has more magnesium and iron than the rocks, according to data sent back by the 1997 Mars Pathfinder mission.

Yen believes that the dust can only have come from tiny metal-rich debris that constantly falls onto Mars from space.

According to his calculations, the dust-fall is big enough to coat Mars to a depth of two inches every billion years.

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#2    SpaceyKC

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Posted 04 September 2003 - 08:49 PM


        I guess you could say that Yen's theory could blow the others
         'out of the water'.   grin2.gif
           Great article starlyte.   thumbsup.gif    
        Christmas Day could bring a really nice suprise (as far as the topic
              of Mars is concerned).    

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         found no remedy for the worst of them all --- the apathy of human beings."
                                                     Helen Keller

#3    Homer

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Posted 06 September 2003 - 03:53 AM

Thanks starlyte, that's a fascinating article.
It will be interesting to see the information brought back from those three Mars missions original.gif  

אַ֭תָּה אֱלֹהֵ֣י יִשְׁעִ֑י

#4    Kaj

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Posted 06 September 2003 - 10:56 AM

QUOTE (Homer @ Sep 6 2003, 03:53 AM)
Thanks starlyte, that's a fascinating article.
It will be interesting to see the information brought back from those three Mars missions original.gif

Yes...this will be exciting...waiting for that too original.gif

Btw, good work Starlyte

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