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Space Forum / Astronomy / July 2008What if (on planets magnetic field)
What if planets magnetic fields are not created by dynamoes at their core? The Sun's not Jupiter a big maybe. Mars has the spin and iron but the fudgy dynamo theory won't fit Curie proved our core dynamo theory is an idea that want work. Bert PS our magnetic field never flips Any planet or star with moving charges will have a magnetic field. Mars doesn't have Earth's moving charge, obviously. Gravity at the surface of Venus is 10 percent less than on Earth, so maybe there's not enough gravity ( i.e. pressure containment ) to create a moving charge / magnetic field as large as Earth's. With less pressure containment ( i.e. gravity ) and more heat, all water has boiled off the face of Venus. > Any planet or star with moving charges will have a magnetic field. > Mars doesn't have Earth's moving charge, obviously. [quoted text clipped - 5 lines] > With less pressure containment ( i.e. gravity ) and more heat, > all water has boiled off the face of Venus. Was the core molten is the question? It so then the metal in it was in motion and that means a magnetic field. If it cools later whatever state the stuff was in gets frozen in place and there will be a very weak residual. Gravity only plays a roll in getting enough stuff together to make a planet big enough to melt its core. > Any planet or star with moving charges will have a magnetic field. > Mars doesn't have Earth's moving charge, obviously. [quoted text clipped - 5 lines] > With less pressure containment ( i.e. gravity ) and more heat, > all water has boiled off the face of Venus. Was the core molten is the question? It so then the metal in it was in motion and that means a magnetic field. If it cools later whatever state the stuff was in gets frozen in place and there will be a very weak residual. Gravity only plays a roll in getting enough stuff together to make a planet big enough to melt its core. > JeffÅ£Relf wrote: > > Any planet or star with moving charges will have a magnetic field. [quoted text clipped - 3 lines] > > so maybe there's not enough gravity ( i.e. pressure containment ) > > to create a moving charge / magnetic field as large as Earth's. Hunh? There's no gravity to speak of created by the alternator in my motorcycle, yet it creates quite a lot of power. > > With less pressure containment ( i.e. gravity ) and more heat, all > > water has boiled off the face of Venus. [quoted text clipped - 6 lines] > Gravity only plays a roll in getting enough stuff together to make a > planet big enough to melt its core. There was the hypothesis for a while that Venus periodically undergoes its own little Iron Catastrophe. The puzzle was to explain the relatively scarce impact craters, and one solution was that Venus periodically heated up its core enough that then, convulsively, the whole planet recycled its surface. Having released its heat, the surface would cool and solidify, a clean slate for more bombardment from space. Meanwhile, the core would warm up again from radioactive decay... http://www-ssc.igpp.ucla.edu/personnel/russell/papers/venus_mag/ is an article that would make for good reading on the magnetic field.  SignatureTimberwoof <me at timberwoof dot com> http://www.timberwoof.com "When you post sewage, don't blame others for emptying chamber pots in your direction." ‹Chris L. Another BEERTbrain CRACKPOT theory! lmao! No Nobel for you! Saul Levy >Bert PS our magnetic field never flips Cactus Saul The theory that the Earth's magnetic poles do a 180 flip is a crackpot theory. They jumped without thinking. I can relate it to a mirror changing the direction of print Bert |
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