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Astronomy

The Magnetospheric Dynamics of Uranus and Neptune During Equinox

Quick fact

Voyager 2 visited Uranus and Neptune near their solstices, not equinoxes, so scientists have never directly observed equinox magnetospheres there; computer models suggest they become dramatically more dynamic, with magnetic poles opening to the solar wind and reconnection events occurring on a daily timescale.

Why this is interesting

Imagine two spinning tops with built-in compasses—one almost lying on its side, the other tilted like Earth. Twice per orbit, their magnetic poles point straight at the Sun, and their magnetospheres flip into a bizarre 'vortex' mode. What happens to these magnetic bubbles during equinox?

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The Magnetospheric Dynamics of Uranus and Neptune During Equinox

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