Martian Hydrology |
Martian Hydrology |
Nov 23 2010, 08:46 PM
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#1
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
An interesting article from Space Daily today: http://www.marsdaily.com/reports/Shallow_G...n_Mars_999.html
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Dec 7 2010, 08:06 PM
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#2
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Member Group: Members Posts: 555 Joined: 27-September 10 Member No.: 5458 |
And most people forget that the ground has pressure as well.
Edit: I guess I overlooked your last line. Yes, in this sense, it would be rare for liquid water to ever exist on the surface of Mars. However, honestly I have no idea what temperature water would need to be to exist as liquid. I will have to calculate that out. Edit 2: Heres and interesting link. I found this on a quick search. Looks like a good read for this thread. -------------------- |
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Dec 8 2010, 02:19 AM
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#3
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Junior Member Group: Members Posts: 59 Joined: 12-November 09 Member No.: 5039 |
And most people forget that the ground has pressure as well. Edit: I guess I overlooked your last line. Yes, in this sense, it would be rare for liquid water to ever exist on the surface of Mars. However, honestly I have no idea what temperature water would need to be to exist as liquid. I will have to calculate that out. Water needs 0 C or 273 K to become liquid. Even on Mars. Melting temp depends only weakly on pressure. QUOTE Edit 2: Heres and interesting link. I found this on a quick search. Looks like a good read for this thread. Here is an photo example of mini-gullies on Earth which definitely are not formed by water: http://uploaded.fresh.co.il/2007/03/16/46040681.jpg I know it is far from being scientific, but still... |
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Dec 8 2010, 05:11 AM
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#4
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Melting temp depends only weakly on pressure. That may be true but the boiling point of water depend quite a bit on pressure. And under most ambient Martian pressure conditions the boiling point is a fraction of a degree above and sometimes equal-to your melting point. As a result you are never going to have liquid water beyond a few fleeting moments under extremely rare conditions. Best to leave your goldfish at home there's no stable liquid water on Mars. -------------------- If Occam had heard my theory, things would be very different now.
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