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Francis Nimmo

Diagram of the interiors of Jupiter and Saturn.
Posted inEditors' Highlights

Gas Giants with Fuzzy Cores

by Francis Nimmo 10 April 20248 April 2024

New measurements of Jupiter and Saturn show that both planets have dense cores that are gradational (fuzzy) and large, rather than small and compact.

Infographic showing different parts of the Psyche spacecraft.
Posted inEditors' Highlights

Preparing to Meet a Metal-Rich Asteroid

by Francis Nimmo 28 February 202428 February 2024

The recently launched ‘Psyche’ mission will explore the eponymous asteroid and determine whether it is a fragment of a planetary core or a primordial, metal-rich body.

Model of the velocity field for Jupiter.
Posted inEditors' Highlights

A Wider and Deeper View of Jupiter’s Jets

by Francis Nimmo 9 January 20248 January 2024

The mid-latitude jets on Jupiter are driven by turbulence that arises, in part, from deep cells, consistent with Juno microwave and gravity observations.

Posted inEditors' Highlights

Young Ponds on Mars

by Francis Nimmo 25 February 202215 March 2022

A detailed study of evaporite (chloride) deposits on Mars shows that small bodies of surface water persisted until about 2.5 Ga, more recently than previously thought.

Posted inEditors' Highlights

A Deep-Space Origin for Volatile-Rich Asteroids

by Francis Nimmo 19 January 202215 March 2022

Spectral data and modeling suggest that volatile-rich main-belt asteroids initially formed at much greater distances from the Sun (>10 AU).

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.”

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Scientists Reveal Hidden Heat and Flood Hazards Across Texas

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Revised Emissions Show Higher Cooling in 10th Century Eruption

16 May 202515 May 2025
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Decoding Crop Evapotranspiration

6 May 20256 May 2025
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