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NASA's Juno probe reveals chaos on Jupiter

J.E.P. Connerney et al., Science (2017)

The first science results are in from NASA spacecraft Juno's close pass over Jupiter last summer:

  • There are huge cyclones up to 870 miles in diameter at both of Jupiter's poles, which appear to be chaotic and violent.
  • Jupiter's gravitational field is massive - roughly 10 times Earth's magnetic field and greater than what NASA scientists had expected.
  • There's quite a light show on the gas planet. Juno detected electron beams showering energy downward into Jupiter's upper atmosphere, which may be what powered the huge aurorae the probe saw in ultraviolet and infrared images it captured.
  • Unexpectedly, there are signs of ammonia welling up from its deep atmosphere, indicating a giant weather system across the planet.