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Originally Posted by Xeion
Ok... Mars has no magnetic field because if the poles switching this has been proven!
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Mars may have had a dynamo at one time, but from the evidence hasn't had one for about four billion years. Earth shows no evidence of losing its dynamo any time soon (many millions of years), regardless of pole changes.
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But not only did it lose its magnetic feild, and gravity by over half its orignal gravatational pull
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Is this a claim? If so, this would be more appropriate for the ATM forum. There is no evidence that the mass of Mars has changed, but it has always been far less than that of Earth, and it never could hold an atmosphere as well as Earth. That made solar wind erosion more significant for Mars than it ever would be for Earth.
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but also its atmosphere now if im not wring if it happened to Mars it could hapopen to Earth , seeming though Earth is a much more delacate and dense planet than Mars. Um... Mass doent come into it when concerning a atmosphere if MArs could hang on to its atmosphere for over 4 million years why not 4 more....
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Mars could have held onto a significant atmosphere for far longer than four million years. Billions of years (especially given the likely higher solar wind in the sun's early days as well as impact erosion back then) is another matter.
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not the lack of mass it is infact the polatrties switching and getting caught in the merguary, so the poles swtiching play a massive act on the atmosphere and also the core resistance to the inner core would also increase by 85% if the poles did switch, this means the gravity of the Earth would dramtically drop.
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Yes, this is sounding like an ATM claim and not a question. No, the Earth's magnetic field isn't going to affect the Earth's gravity.