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May 26, 2017 08:00 am

Juno Spacecraft Reveals Spectacular Cyclones At Jupiter's Poles

Joe Palca reports via NPR: NASA's Juno spacecraft has spotted giant cyclones swirling at Jupiter's north and south poles. That's just one of the unexpected and puzzling findings being reported by the Juno science team. Juno arrived at Jupiter last summer. It's the first spacecraft to get a close-up look at the planet's poles. It's in an orbit that takes it skimming close to the cloud tops of the gas giant once every 53 days. After each close pass, the spacecraft sends a trove of data back to Earth. Ultimately, scientists will want to understand how these cyclones change over time and whether they form differently in the north and south poles. Another puzzle that Juno is supposed to help solve is whether Jupiter, a gas giant, has a solid core. Another surprise from Juno is the concentration of ammonia in Jupiter's atmosphere. Scientists thought ammonia was most likely distributed evenly throughout the atmosphere. The data show there's more ammonia near the equator than there is at other latitudes.

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