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The magnetic poles do move a bit, but stay mainly near the north and south geographic poles. As the continents move, though, different areas of crust overlay the magnetic poles, and the paleomagnetic markers (such as iron granules) point to where the pole WAS when they were deposited and then solidified into position. These "polar" crustal regions later move and the poles appear to have moved; actually, the crust has moved instead.

For example, the north magnetic pole now is on an arctic island. In 100 milliion years that island may have been moved by plate tectonics to the equator, and the lava deposited in Yellowstone will point to that area.

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Compare and contrast apparent magnitude and absolute magnitude?

Apparent magnitude is the brightness of a celestial object as seen from Earth, taking into account distance and extinction from the atmosphere. Absolute magnitude measures the intrinsic brightness of a celestial object if it were placed at a standard distance of 10 parsecs (about 32.6 light-years) away from Earth. In essence, apparent magnitude is how bright an object appears from Earth, while absolute magnitude is how bright it would be at a standardized distance.


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Apparent magnitude is a measure of how bright a star appears from Earth, taking into account its distance and how much light it emits. Absolute magnitude, on the other hand, is a measure of a star's intrinsic brightness if it were observed from a standard distance of 10 parsecs. It helps in comparing the true brightness of stars regardless of their distance from Earth.


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