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planetary interiors

Schematic of how oscillations inside Saturn generate spiral density waves in the rings
Posted inEditors' Highlights

Using Saturn’s Rings as a Seismometer

by F. Nimmo 12 May 202024 May 2023

The Cassini spacecraft observed spiral density waves in the rings of Saturn which can be used to probe its interior structure and rotation.

Illustration of an impact on Pluto
Posted inNews

Ancient Impact’s Seismic Waves Reveal Pluto’s Ocean, Core

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 6 April 202017 February 2023

By modeling the waves produced by a massive, ancient impact, scientists have begun to unlock the secrets of Pluto’s interior.

Figure showing whether assemblages containing quartz, talc, and carbonate can be produced from an oxidized hydrous rocky core under plausible conditions for Enceladus.
Posted inEditors' Highlights

The Freshest Mineral Water in the Solar System

by A. Dombard 24 March 202022 December 2021

The water-rich plumes erupting from Saturn’s moon Enceladus show the chemical signs of water-rock interactions deep within the moon, further implicating Enceladus as a potential habitat for life.

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 201927 March 2023

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

An artist’s illustration shows a planet crashing head on into Jupiter, with the young solar system swirling the background.
Posted inNews

Massive Collision Cracked Young Jupiter’s Core

Mary Caperton Morton, Science Writer by Mary Caperton Morton 13 September 20192 February 2022

The gas giant’s interior reveals evidence of an ancient impact.

Artist’s rendering of disintegrating planet Kepler-1520b.
Posted inNews

Webb Telescope May Detect Minerals from Shredded Worlds

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 12 September 20189 November 2021

The upcoming James Webb Space Telescope should be able to measure the composition of vaporizing exoplanets, giving clues about the makeup of their cores, mantles, and crusts.

Image of part of the Cerberus Fossae fault, taken by the HiRISE instrument aboard the Mars Reconnaissance Orbiter.
Posted inResearch Spotlights

Searching for Signs of Marsquakes

Kate Wheeling, freelance science writer by Kate Wheeling 28 August 201828 July 2022

Researchers use high-resolution images of Mars’s surface to look for signals of coseismic displacement.

Posted inEditors' Highlights

How Did Venus Get its Youthful Surface?

by S. A. Hauck II 17 May 201816 November 2021

Catastrophic lithospheric recycling is unlikely to be the cause of Venus’s young surface from mantle convection models constrained by offset between the center of mass and center of shape of planet.

Nine polar storms surrounding Jupiter’s north pole
Posted inNews

New Juno Data Reveal Four Key Secrets of Jupiter

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 28 March 201817 February 2023

Deep clouds, polar storms, lopsided gravity, and a uniformly rotating interior demonstrate that the gas giant plays by different rules than Earth.

Researchers use models to examine the orientation of poles on Neptune’s moon Triton
Posted inResearch Spotlights

Time, Tides, and Wandering Poles

Alexandra Branscombe by A. Branscombe 5 July 201715 March 2022

Models of Neptune’s moon Triton reveal curious behavior in how tidal forces and mass anomalies cause the poles to reorient their location.

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