Journal
SCIENCE
Volume 356, Issue 6340, Pages 821-825Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aal2108
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Funding
- NASA/ESA Hubble Space Telescope (HST) program [GO14334]
- NASA [NNM06AA75C, NNN12AA01C, NAS5-26555]
- Centre National d'Etudes Spatiales
- Agenzia Spaziale Italiana (ASI)
- ASI
- NASA through Space Telescope Science Institute
- STFC [ST/P000541/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/P000541/1] Funding Source: researchfish
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On 27 August 2016, the Juno spacecraft acquired science observations of Jupiter, passing less than 5000 kilometers above the equatorial cloud tops. Images of Jupiter's poles show a chaotic scene, unlike Saturn's poles. Microwave sounding reveals weather features at pressures deeper than 100 bars, dominated by an ammonia-rich, narrow low-latitude plume resembling a deeper, wider version of Earth's Hadley cell. Near-infrared mapping reveals the relative humidity within prominent downwelling regions. Juno's measured gravity field differs substantially from the last available estimate and is one order of magnitude more precise. This has implications for the distribution of heavy elements in the interior, including the existence and mass of Jupiter's core. The observed magnetic field exhibits smaller spatial variations than expected, indicative of a rich harmonic content.
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