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V-GER
2005-Sep-08, 07:56 PM
Not quite sure where to post this here on the new board so here goes:

Ice on the ancient martian equator? These scientists seem to think so:

http://news.bbc.co.uk/2/hi/science/nature/4226236.stm

This is the first time I've heard of equatorial ice in such quantities.

ToSeek
2005-Sep-13, 04:40 PM
Ice Belt Encircled Mars' Equator (http://www.spacedaily.com/news/mars-water-science-05n.html)


ESA's Mars Express space probe that entered orbit at the end of 2003 may have found evidence of a band of ice that once spanned the Martian equator.

Scientists says patterns of glacial activity on the planet may be a relic of an ancient belt of ice that formed about five million years ago due to a change in the tilt of Mars. That shift caused moisture from the poles to be deposited as snow at the equator.

V-GER
2005-Sep-13, 08:31 PM
You've been ToSeeked, ToSeek
http://www.bautforum.com/showthread.php?t=30763

William_Thompson
2005-Sep-13, 08:47 PM
Isn't it because that -- without a huge moon to stabilize the axis -- the revolution axis of Mars drifts and the degree of tilt towards the orbital plane of the solar system becomes more extreme over time?

Thus, when the axis is at a 90 degree tilt, ice forming on the area that would be “north most” in relation to the orbital plane of the solar system is rotated around the tilted axis but instead of behaving like a warm equato like on earth, it keeps its distance from the sun and the sun's rays do not hit it at right angles but at an angle more akin to a pole would be on Earth.

Has anyone else thought of this?

Am I the first?

aurora
2005-Sep-13, 09:20 PM
Has anyone else thought of this?

Am I the first?

From the linked article in the OP:



Laskar's team has shown the tilt of Mars on its axis can vary between 15 degrees and 40 degrees, largely because of its lack of a significant moon.

Researchers also found that when Mars' tilt changed to about 35 degrees, moisture trapped at the North and South Poles might have been re-deposited in equatorial regions as snow.

ToSeek
2005-Sep-13, 09:46 PM
You've been ToSeeked, ToSeek
http://www.bautforum.com/showthread.php?t=30763

Threads merged.

William_Thompson
2005-Sep-13, 10:17 PM
From the linked article in the OP:
Well, good, then. Althought I was not the first to think of it, I did think of it on my own. And I am glad I am not alone and I am in good company.