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Planetary interiors

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.

NASA image of the Tharsis volcanoes on Mars.
Posted inNews

Tiny Volcanoes Are a Big Deal on Mars

by Erik Klemetti 7 May 202110 November 2021

Cinder cones and fissure vents provide clues about the evolution of the Red Planet’s mantle and crust.

Two models of the surface magnetic field of Saturn
Posted inEditors' Highlights

Saturn’s Dynamo Illuminates its Interior

by F. Nimmo 5 May 202115 March 2022

Saturn’s oddly symmetrical magnetic field can be explained by models in which the active dynamo region is overlain by a thick, stable layer cooled more strongly at the poles.

Cartoon illustration of the possible distribution of materials of different origins in the interior of a Mars-size planetary embryo.
Posted inEditors' Highlights

How Not to Homogenize a Planet

by Laurent G. J. Montési 28 April 202112 October 2022

Even the strong heating from short-lived aluminium-26 (26Al) would not be able to homogenize the interior of a Mars‐sized planetary embryo.

Cutaway view of a rocky planet’s layered interior structure with a nebula in the background
Posted inNews

Superlasers Shed Light on Super-Earth Mantles

by Kimberly M. S. Cartier 10 March 202130 September 2021

By compressing iron oxide to pressures expected inside a large and rocky exoplanet, scientists discovered that such mantles could layer, mix, and flow in ways very different from those inside our planet.

Map of thorium concentrations across the South Pole–Aitken Basin on the Moon’s farside
Posted inResearch Spotlights

Moon’s Largest Crater Holds Clues About Early Lunar Mantle

by Elizabeth Thompson 12 February 202128 January 2022

An ancient impact splashed evidence of the Moon’s early mantle makeup onto its surface. Now researchers are piecing together models, maps, and samples to bring these mysteries to light.

Plot showing evolution of crustal thickness over time for mantle convection models of Venus with different yield strength
Posted inEditors' Highlights

What Happened When the Lithosphere of Venus Broke?

by Laurent G. J. Montési 5 January 202115 March 2022

Although Venus does not have plate tectonics today, previous episodes of intense tectonic activity could have resulted in a distribution of crustal thickness and age resembling the plate we see today.

A graphic in space showing Earth’s magnetic field lines with the sun in the background.
Posted inAGU News

The Wobbly Anomaly and Other Magnetic Weirdness

by Heather Goss 21 December 202030 September 2021

From the connection between Earth’s core and life on the surface, way out to the ends of the solar system, this month’s issue of Eos takes a look at the study of magnetic fields.

Lavender colored electrical arcs crackle around a large round instrument that glows blue.
Posted inFeatures

Remaking a Planet One Atom at a Time

by Kimberly M. S. Cartier 24 June 202022 November 2021

When is a planet not a planet? Where does helium rain? How can water be solid and liquid at the same time? For answers, scientists put common planetary materials under extreme pressure and watched what happened next.

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 202015 March 2022

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

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Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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