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2 answers

By direct measurement. We didn't even know that Jupiter HAD a magnetic field until Voyager went there and we heard it on the radio.

2006-09-13 03:16:20 · answer #1 · answered by Anonymous · 0 0

by size and chemical makeup - more iron = greater magnetic intensity

2006-09-13 10:18:08 · answer #2 · answered by litch 3 · 0 0

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