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Ganymede

Images of 3 craters.
Posted inEditors' Highlights

Unveiling the Origins of Dome Craters on Ganymede and Callisto

by Kelsi Singer 23 July 202422 July 2024

Large craters with broad central domes are a unique crater morphology on Jupiter’s largest icy moons: Ganymede and Callisto. A new study examines how remnant impact heat may lead to their formation.

An illustration showing the interior of Mercury, including its crust; the mantle, with a red “snow zone” with illustrations of iron snowflakes; and the core.
Posted inResearch Spotlights

Iron Snow Ebb and Flow May Cause Magnetic Fields to Come and Go

by Nathaniel Scharping 2 January 20242 January 2024

Lab experiments find that iron crystals in planetary cores may form in bursts, causing periodic dynamos.

Plot showing measured magnetic field on Juno as a function of frequency and time on 29 May 2019
Posted inEditors' Highlights

Radio on Jupiter, Brought to You by Ganymede

by A. Yau 25 January 202127 January 2022

Another first from NASA’s Juno spacecraft: the detection of Jupiter radio emissions influenced by the moon Ganymede, over a range of about 250 kilometers in the polar region of Jupiter.

Pair of images of Jupiter’s moon Ganymede taken by a passing spacecraft
Posted inResearch Spotlights

Juno Maps Water Ice Across Northern Ganymede

by Morgan Rehnberg 14 January 202111 April 2023

Infrared observations from instruments on the Juno spacecraft cover regions of Ganymede not visible to Earth-based telescopes.

Composite satellite images of Jupiter’s Galilean moons: Io, Europa, Ganymede, and Callisto
Posted inNews

Jupiter’s Galilean Moons May Have Formed Slowly

Mara Johnson-Groh, Science Writer by Mara Johnson-Groh 30 September 201922 July 2024

A new model is the first to simultaneously explain many of the moons’ characteristics, including their mass, orbits, and icy composition

New research suggests that the movement of Europa’s ice crusts could be a sign of life.
Posted inResearch Spotlights

How Jupiter’s Icy Moons Got Their Bands and Grooves

by E. Underwood 31 July 201823 January 2023

Europa’s churning ice crust could reveal signs of ocean life, new study suggests.

A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

Features from AGU Publications

Research Spotlights

Mapping the Ocean Floor with Ancient Tides

6 May 20256 May 2025
Editors' Highlights

First Benchmarking System of Global Hydrological Models

7 May 20257 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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