History of Magnetosphere

	Revision 8 . . November 10, 2001 2:12 pm by (logged).237.32.xxx
	Revision 7 . . (edit) November 10, 2001 2:11 pm by (logged).237.32.xxx

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Difference (from prior major revision) (no other diffs)

Changed: 1c1

When an astronomical object has a magnetic field and an atmosphere, it is commonplace for ions to form a plasma that is trapped in the magnetic field. The plasma conducts electric current. Therefore, when it tries to flow through the magnetic field, eddy currents form and resist the motion.

When an astronomical object has a magnetic field and an atmosphere, it is commonplace for ions to form a plasma that is trapped in the magnetic field. The plasma conducts electric current. Therefore, when it tries to flow through the magnetic field, eddy currents form and resist the motion.

Changed: 5c5

The ions are usually formed as sunlight, especially ultraviolet, hits the upper atmosphere. As planets get farther from the sun, their magnetospheres therefore become less dense, and less active. Objects that lack a magnetic field, such as the moon, lack a magnetosphere. Objects that lack atmosphere also lack one.

The ions are usually formed as sunlight, especially ultraviolet, hits the upper atmosphere. As planets get farther from the sun, their magnetospheres therefore become less dense, and less active. Objects that lack a magnetic field, such as the moon, lack a magnetosphere. Objects that lack atmosphere also lack one.