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Story summary
- Researchers using the James Webb Space Telescope (JWST) observed variability in Jupiter's auroras at Io and Europa footprints during a 22-hour September 2023 observation.
- They detected a cold spot within Io's footprint, measuring 538 Kelvin, well below surrounding aurora.
- The density in that area was three times higher than typical.
- Rapid fluctuations reveal dynamic interactions between high-energy electrons and Jupiter's atmosphere, prompting questions about their frequency and planetary implications.
