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Tech Head - The Technology Section
Einstein's Alcove
Pole shift
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<blockquote data-quote="haggard" data-source="post: 69195" data-attributes="member: 183237"><p>To return to the original question, I am concerned that some invented apocolyptic event like 'toutatis' should have been tossed in to this scientific forum as if it might really happen. These things are the modern version of those poeple who used to walsk the streets with sandwich boards proclaimind 'the end of the world is nigh'. They predict events, some of them even say, as they go for a regular holiday into the Rocky mountains, that they are relocating their family for 'safety'. Of course, apocolypses would never hit the famous rockies. </p><p></p><p>If the Earth's magnetic field should shift, then an orbiting satellite would not notice the magnetic change directly. The satellite's dynamics are dictated by the strength of the Earth's gravitational field and since the Earth's mass would not change and G would not change with a mag field flip, the orbit of the satellite would not change. There might be secondary effects. A change in the Earth's magnetic field direction implies some shift in the magnetic core. This implies a change in internal angular momentum which must be compensated in order to conserve overall angular momentum. So if a huge mass of iron changed its radial postion, the Earth would have to speed up or slow down it's daily rotation and then the satellite would no longer be geostationary. It could easliy be made geostationary again by using some fuel to move to a new orbit.</p></blockquote><p></p>
[QUOTE="haggard, post: 69195, member: 183237"] To return to the original question, I am concerned that some invented apocolyptic event like 'toutatis' should have been tossed in to this scientific forum as if it might really happen. These things are the modern version of those poeple who used to walsk the streets with sandwich boards proclaimind 'the end of the world is nigh'. They predict events, some of them even say, as they go for a regular holiday into the Rocky mountains, that they are relocating their family for 'safety'. Of course, apocolypses would never hit the famous rockies. If the Earth's magnetic field should shift, then an orbiting satellite would not notice the magnetic change directly. The satellite's dynamics are dictated by the strength of the Earth's gravitational field and since the Earth's mass would not change and G would not change with a mag field flip, the orbit of the satellite would not change. There might be secondary effects. A change in the Earth's magnetic field direction implies some shift in the magnetic core. This implies a change in internal angular momentum which must be compensated in order to conserve overall angular momentum. So if a huge mass of iron changed its radial postion, the Earth would have to speed up or slow down it's daily rotation and then the satellite would no longer be geostationary. It could easliy be made geostationary again by using some fuel to move to a new orbit. [/QUOTE]
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Einstein's Alcove
Pole shift
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