Come on dude, I know when something is above my pay grade, that's why i asked, you suggested that Mars would form a magnetic field if it had an denser atmosphere then you gave links but the links didn't support your opinion at all, in fact never mentioned it. Why would you expect mars to generate a magnetic field if it had a substantial atmosphere?
I could see how spinning the moon, if it still has a molten core might generate a magnetic field, but why would mars?
The first link discussed their findings that the Earth's core appears to be non-conductive. If true the dynamo effect would not be the cause of the Earth's magnetic field or influence the extent of its strength.
The second link explains that the moon reacts differently to the solar wind than what theory had predicted.
The bottom line to me is that our Theories of planetary magnetism are simply wrong. My expectation is that planetary magnetism has two causes and influences; neither are accordingly related to the core of the planet or moon. The primary cause, I expect, is the relative motion of a relatively dense atmosphere with a liquid and/or solid surface. This causes ionization of the atmosphere and electrical currents through its fluids in the opposite direction of its rotation. The magnetic field would accordingly be created perpendicular to the atmospheric wind for most planets. The second cause of planetary magnetism would be the charged particles from the solar wind that could strengthen a pre-existing magnetic field.
The Earth has these condition but Venus' rotation is too slow. Mars' atmosphere is too thin and when it flows in strength and volume (the wind) it is seasonally moving south-north, north-south (primarily water and CO2). The result is a very small east-west magnetic field.
The outer planets have a thick atmosphere and thought to have liquid interiors/ surfaces. Being farther from the sun there would be less strengthening of a pre-existing magnetic field by the solar wind. Mercury has a weak magnetic field accordingly due to a miniscule atmosphere and relatively little spin rate. The solar wind there, however, is very strong and may be the only cause of its weak magnetic field. Titan, on the other hand, has a substantial atmosphere, liquid on its surface, but a slow spin rate, about 16 Earth days. It also experiences mush less solar wind per volume of its atmosphere. The result is that it also has only a very weak magnetic field.
Magnetic fields could accordingly reverse upon a great solar storm which would overload the atmosphere with an influx of positive ions. The 'Earth's magnetic field is half way between its spin access and its incline to the solar system plane.
Of course this is only theory, and not the present mainstream dynamo model of planetary magnetism, which I believe has been contradicted
by observations of most planets. //
Yes, perhaps the moon would be easier than Mars or Venus.
Also, are you saying that even if people were planning to live on a terraformed Mars, they would have to be genetically altered to better suit it's atmosphere and climate?
No, only the plants and animals I think would need modification. I would expect some day there would be a difference in the physical characteristics between native born Martians and Earthlings. Earthlings, for one thing, would probably be stronger because of its gravity, resulting in native born Martians not doing as well physically on Earth.//
Edited by pantheory, 1 June 2012 - 06:27 PM.