Asked by Lance

Look at the picture on the immediate left here:
http://en.wikipedia.org/wiki/Earth's_magnetic_field

Also:
http://image.gsfc.nasa.gov/poetry/magnetism/magnetism.html

HOW IS THE EARTH'S MAGTISM USEFUL

thanks it helped me alot!!!!!!!!!!!
Answered by Anonymous
A PLANET WITH A FORCE OF GRAVITY 0.379 TIMES THAT OF EARTH
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