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Jupiter

Diagram showing the molecular hydrogen in Callisto’s atmosphere.
Posted inEditors' Highlights

Callisto’s H Corona: Offspring of the Surface or the Atmosphere?

by Beatriz Sanchez-Cano and Anni Määttänen 7 December 202219 January 2023

The mostly unknown Callisto’s H corona is created by a global tenuous H2 atmosphere and not by surface water as previously believed, providing the first evidence for H2 in Callisto’s atmosphere.

Spacecraft view of the surface of Jupiter’s moon Europa showing a complex pattern of ridges and bands.
Posted inResearch Spotlights

Europa’s Plate Tectonic Activity Is Unlike Earth’s

by Morgan Rehnberg 29 November 202227 January 2023

The moon of Jupiter has likely experienced intermittent, regional plate tectonic activity in the past, although the plates are currently dormant.

Swirling cloud bands in Jupiter’s northern hemisphere
Posted inNews

Could Jupiter’s Heat Waves Help Solve a Planetary Energy Crisis?

by Tim Hornyak 9 November 202217 February 2023

Infrared observations reveal that Jupiter’s upper atmosphere is much warmer than models predict. The discovery may be a clue to finding missing heat sources in other giant planets.

Artistic interpretation in which part of Earth is seen from above, and a bright trail of light pierces clouds and ends in what looks like an explosion
Posted inNews

Impact Crater off the African Coast May Be Linked to Chicxulub

by Katherine Kornei 19 September 202213 October 2022

The underwater crater, spotted serendipitously in commercial observations of seafloor sediments, is believed to have formed at roughly the same time as the famous Cretaceous-Paleogene impact event.

Figures showing global distributions of calculated height-integrated Pedersen conductance and Hall conductance.
Posted inEditors' Highlights

Meteoric Ions Influence Conductance in the Jovian Ionosphere

by Viviane Pierrard 29 April 20227 September 2022

Meteoric ions dominate the Jovian lower ionosphere due to their long lifetimes. Due to the large densities of the meteoric ions, conductance is enhanced independently of local time.

The layers of Jupiter’s atmosphere visible to Juno’s microwave radiometer
Posted inResearch Spotlights

A Transition Zone Below Jupiter’s Clouds

by Morgan Rehnberg 12 November 202127 January 2022

The microwave radiometer aboard NASA’s Juno spacecraft reveals the hidden atmospheric circulations at work deep below Jupiter’s colorful clouds.

The location of Jupiter’s northern aurorae, as seen by the Hubble Space Telescope
Posted inResearch Spotlights

Could Low-Altitude Reconnection Power Jupiter’s Polar Aurorae?

by Morgan Rehnberg 21 September 202127 January 2022

Magnetic reconnection events less than 2 Jovian radii above the planet’s cloud tops could explain why Juno has yet to observe a source for Jupiter’s polar aurore.

A new population of highly energetic ions has been discovered at midlatitudes within the inner edge of Jupiter’s relativistic electron belt.
Posted inResearch Spotlights

Juno Detects Jupiter’s Highest-Energy Ions

by Morgan Rehnberg 17 June 202127 January 2022

Trapped ions discovered at midlatitudes can have energies exceeding 100 megaelectron volts per nucleon. Their detection adds to our understanding of the powerful radiation environment around Jupiter.

Chart plotting the evidence presented in the commentary by Weiss and Bottke.
Posted inEditors' Highlights

Fingerprints of Jupiter Formation

by Bethany Ehlmann 16 June 202127 January 2022

Meteorite isotopes, meteorite paleomagnetics, and planet formation models collectively show Jupiter formation via first slow then fast collection of material by core accretion in <5 million years.

Polar projections of the UV aurora showing four phases of a Jovian dawn storm
Posted inEditors' Highlights

Dawn Storms at Jupiter

by M. Hudson 16 March 202127 January 2022

Juno spacecraft observations provide the first global description of dawn storms in Jupiter’s aurorae, from their initiation to their end.

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