magnetopause

magnetopause

[mag-nee-tuh-pawz]
noun Astronomy.
1.
the boundary between the earth's magnetosphere and interplanetary space, about 40,000 miles (65,000 km) above the earth, marked by an abrupt decrease in the earth's magnetic induction.
2.
a similar feature of some other planet.

Origin:
1960–65; magneto- + pause

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