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Mercury

A satellite orbiting Mercury
Posted inEditors' Highlights

Mercury’s Hollows may be Young and Active

by Jean-Pierre Williams 21 February 202521 February 2025

The first machine learning-derived global-scale survey of Mercury’s hollows suggests they are young features that may be active and will continue to evolve.

A cylindrical spacecraft with two rectangular wings hovers above a gray planet with purple mist rising from it.
Posted inNews

Dramatic Flyby Confirms That Mercury’s Radioactive Aurora Touches the Ground

by Matt Hrodey 1 August 20231 August 2023

Data collected by the BepiColombo spacecraft traces the causes of the strange aurora, which course through the planet’s weak magnetosphere.

A photo of a cratered, gray sphere. Two long arms of a spacecraft are visible in the foreground.
Posted inNews

Spacecraft to Swing Past Mercury for Third Time

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 14 June 202314 June 2023

With each flyby, the BepiColombo mission gets another boost of energy for its eventual orbital insertion around Mercury.

An artist’s rendering of three hazy rings surrounding the Sun near the orbits of Mercury, Venus, and Earth
Posted inNews

Mercury Isn’t Alone in Orbit, and Scientists Don’t Know Why

by Jure Japelj 27 February 202324 May 2023

A cloud of dust traces the innermost planet’s orbital path. By all accounts, it shouldn’t be there.

Two-image animation of a location on Mercury’s surface showing a small impact event
Posted inResearch Spotlights

MESSENGER Reveals a More Dynamic Mercury Surface

by Morgan Rehnberg 28 September 202225 January 2023

Image pairs indicate that 99% of the planet’s surface could be altered in the next 25 million years.

A computer simulation of solar wind entry layer and flux transfer events (green lines) in Mercury’s dayside magnetosphere
Posted inResearch Spotlights

Solar Wind a Major Driver of Atmospheric Sodium at Mercury

by Morgan Rehnberg 27 May 202227 July 2022

MESSENGER observations show a 50% rise in atmospheric sodium-group ions during periods of high solar wind activity.

Posted inEditors' Highlights

Plasma Density Distribution in Mercury’s Magnetosphere

by Y. Wang 27 February 20197 March 2022

A new measurement of plasma density distribution in Mercury’s magnetosphere obtained from observations of field line resonance events provides necessary constraint for many planetary science issues.

An enhanced-color image of Mercury
Posted inNews

Mercury Mission Will Map Morphology and Measure Magnetics

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 18 October 201817 January 2023

BepiColombo may launch as early as this weekend. It seeks to unravel the mysteries of Mercury’s geologic and magnetic past and map the small planet’s cratered surface.

Mercury’s south pole to 80°S, with an Arecibo radar image in pink indicating locations of water ice.
Posted inResearch Spotlights

Evidence of Extensive Ice Deposits Near Mercury’s South Pole

by Terri Cook 20 April 201810 January 2023

New radar observations and refined illumination maps reveal uneven water ice deposits twice the size of those found around the planet’s north pole, suggesting the source may be a recent comet impact.

Posted inEditors' Highlights

Comparing Craters

by A. Dombard 8 November 20176 March 2023

An analysis suggests that craters degrade faster on Mercury than the Moon, raising questions about landscape evolution on different planetary bodies.

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Features from AGU Publications

Research Spotlights

Proposed Experiment Could Clarify Origin of Martian Methane

12 May 202512 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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