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spacecraft

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.

An image of the Sun showing an eruption of solar material from the Sun’s left side.
Posted inNews

Chinese-Led Solar Research Is Looking Bright

Katherine Kornei, Science Writer by Katherine Kornei 24 May 202210 March 2023

With new missions underway and planned, China is stepping up to observe our nearest stellar neighbor.

On the left: a view of Pluto, as imaged by the New Horizons spacecraft. On the right: a close-up of an undulating region believed to have been formed by volcanoes that erupted icy material.
Posted inNews

Pluto’s Surface Was Recently Sculpted by Icy Volcanism

Katherine Kornei, Science Writer by Katherine Kornei 2 May 202217 February 2023

Geologically young regions of Pluto’s southern hemisphere were likely resurfaced by cryovolcanism, data from the New Horizons spacecraft reveal.

A blue ring of auroral emission glows above Saturn’s north pole.
Posted inNews

Saturn’s Powerful Winds Explain Changes in the Length of Its Day

Katherine Kornei, Science Writer by Katherine Kornei 17 March 20228 August 2022

Atmospheric winds moving at more than 7,000 kilometers per hour distort Saturn’s magnetic field, revealing why spacecraft have measured changes in the length of a day on the ringed world.

This aerial image shows two researchers exploring a sunken spring in the middle of a gray and white icy landscape. One researcher, dressed in blue, crouches inside a circular hole in the ice while a second researcher, dressed in black, stands to the left taking a photo.
Posted inNews

Lipids from Europa’s Ocean Could Be Detectable on the Surface

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 10 March 202210 March 2022

A super salty spring in the Canadian Arctic provides insights key to detecting life on a distant ocean world.

An illustration of the Solar Orbiter spacecraft near the Sun.
Posted inScience Updates

A New Journey Around (and Around) the Sun

by Daniele Telloni, Francesco Valentini and Raffaele Marino 25 February 202231 January 2023

The Solar Orbiter just completed its commissioning phase while en route to the Sun. It has already provided valuable looks at solar campfires and Venus’s magnetic fields, and it promises much more.

An image of lake-floor sedimentary deposits from Mars’s Gale crater
Posted inResearch Spotlights

Machine Learning Algorithms Help Scientists Explore Mars

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 12 January 202224 April 2024

Researchers applied machine learning algorithms to several distinct chemical compositions of Mars and suggest that these algorithms could be a powerful tool to map the planet’s surface on a large scale.

Close-up of the Artemis Gateway in front of the Moon.
Posted inNews

NASA Prepares Its Artemis Gateway to Orbit the Moon

by Jude Coleman 9 December 202118 December 2023

Throughout its anticipated 15-year tour of duty, the Gateway will serve as a station for astronauts and lunar landers—and enable new scientific discovery.

A Mars rover beside a rock with two holes drilled into it
Posted inNews

Scientists Plan a Home Away from Home for Mars Samples

Damond Benningfield, Science Writer by Damond Benningfield 8 December 202127 March 2023

The core tubes being collected by the Perseverance rover won’t arrive for years, but NASA and the European Space Agency are outlining needs for a facility to assess their safety and store and distribute them.

Detail from Eos Mars poster
Posted inNews

Mars from the InSight Out

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 22 November 202128 March 2023

There’s a seismometer on Mars, and it’s been busy! Download our free illustrated poster.

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Features from AGU Publications

Research Spotlights

In the Arctic, Consequences of Heat Waves Linger

22 August 202521 August 2025
Editors' Highlights

Rock-Ice Avalanche Dynamics: What it Erodes Can Affect How Far it Goes

21 August 202520 August 2025
Editors' Vox

Waterworks on Tree Stems: The Wonders of Stemflow

21 August 202520 August 2025
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