James Webb-teleskopet löser mysteriet med Saturnus rotation

29 maj 2026

Rapporterad av AI

Forskare har löst en långvarig gåta kring Saturnus skenbart föränderliga rotationshastighet. Observationer från James Webb-teleskopet visar att planetens norrsken driver en självuppehållande cykel av atmosfärisk uppvärmning och vindar. Resultaten publicerades i Journal of Geophysical Research: Space Physics.

Under flera år hade mätningar från NASA:s rymdsond Cassini från 2004 antytt att Saturnus rotationshastighet förändrades över tid. Planeter kan inte ändra sin rotationshastighet så snabbt, vilket har förbryllat forskare. En studie från 2021 pekade på att atmosfäriska vindar påverkade norrskenssignaler, men kunde inte identifiera orsaken till dessa vindar.

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James Webb-teleskopet löser mysteriet med Saturnus rotation

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