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originally posted by: Xtrozero
originally posted by: Justoneman
Possibly and based on what I have read, we have some Scientist who think that Mars had a big hit and the atmosphere was blown off during that event that was the death blow to the possible life on Mars?
The earth had a rather big hit too ripping out our moon and it didn't wipe out our atmosphere, so I'm not sure about that theory. I'll just go with the cooling of the core leading to the loss of its magnetic field to have the atmosphere slowly bleed off, but then one needs to question why did its core solidify.
Plus, Earth has a magnetic field to trap the lightly magnetic molecules that make up our atmosphere.
I don't know a lot about Mars
originally posted by: Phage
a reply to: Justoneman
Plus, Earth has a magnetic field to trap the lightly magnetic molecules that make up our atmosphere.
Which molecules are those? The magnetic ones, I mean.
Since the magnets on my refrigerator are much stronger than the Earth's magnetic field, does that mean there is a bunch of those molecules accumulated in my kitchen? My stereo speakers have some pretty strong magnets too.
I think it's gravity that mostly keeps our atmosphere here. Venus doesn't have a magnetic field but it has plenty of atmosphere.
Virtually EVERY molecule has a weak magnetic attraction to other things except the Noble Gases Even then the larger ones though Neutral polarity for the whole series have some properties that make for fun nerd stuff.
originally posted by: Phage
a reply to: Justoneman
Virtually EVERY molecule has a weak magnetic attraction to other things except the Noble Gases Even then the larger ones though Neutral polarity for the whole series have some properties that make for fun nerd stuff.
Your wiki article mentions the electromagnetic force which holds electrons to their nucleus and allows atoms to form molecules or not, but it doesn't say anything about neutral atoms or molecules being held by magnetic fields. Electromagnetic force is an effect found between charged particles. Between electrons and protons, for example.
Now, if the atmosphere were to be composed of ions (like the ionosphere) magnetism would have an effect. But it isn't, not so much, it's mostly neutral particles so no, not held by the magnetosphere. Gravity is what does it. Venus has no magnetic field but it has lots of atmosphere.
Do we have evidence of whether it is water or the vapor that turns to ice?
originally posted by: Phage
a reply to: highvein
Do we have evidence of whether it is water or the vapor that turns to ice?
No direct evidence that I know of but the low atmospheric pressure makes the existence of liquid water on the surface problematic.
originally posted by: highvein
originally posted by: Phage
a reply to: highvein
Do we have evidence of whether it is water or the vapor that turns to ice?
No direct evidence that I know of but the low atmospheric pressure makes the existence of liquid water on the surface problematic.
So it is more likely that the water on Mars is stored in either vapor or solid form. Is the atmosphere of mars sufficient to let water vapor escape the planet?
originally posted by: halfoldman
Couldn't we have wind-farms on Mars, and then generate free electricity with a looong fiber optic cable through space for everyone?
originally posted by: halfoldman
Couldn't we have wind-farms on Mars, and then generate free electricity with a looong fiber optic cable through space for everyone?
originally posted by: Justoneman
originally posted by: highvein
originally posted by: Phage
a reply to: highvein
Do we have evidence of whether it is water or the vapor that turns to ice?
No direct evidence that I know of but the low atmospheric pressure makes the existence of liquid water on the surface problematic.
So it is more likely that the water on Mars is stored in either vapor or solid form. Is the atmosphere of mars sufficient to let water vapor escape the planet?
At low Atmospheric pressure it would Sublime or go from ice to gas very fast. If liquid hits the surface it would evaporate very fast. From the looks of things water will not stand on Mars as it is now. But all is not lost if it is under the soil.