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planetary surfaces

Uranus and its moons and rings glow blue, white, and teal in this infrared image. Uranus is seen nearly face-on, and moons are visible both within and outside of the ring system.
Posted inNews

Uranus’s Small Moons Are Dark, Red, and Water-Poor

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 25 November 202526 November 2025

…Except for Mab, which is even weirder than expected.

A satellite image shows dark sand deposits near the south pole of Mars. The shape formed by the deposits is reminiscent of an angel with outstretched wings with a large heart under its right wing.
Posted inResearch Spotlights

Maybe That’s Not Liquid Water on Mars After All

by Rebecca Owen 21 November 202521 November 2025

A “very large roll” of a radar instrument offers new insight into a highly reflective area near the Martian south pole.

A grayscale image of a ridged and cratered moon with only the left hemisphere illuminated.
Posted inNews

Tiny Uranian Moon Likely Had a Massive Subsurface Ocean

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 24 October 202524 October 2025

Ariel’s tempestuous subsurface ocean may have once composed more than half its total volume.

A photo of a gray surface pockmarked with craters, as well as a line representing a fault.
Posted inResearch Spotlights

How Much Has Mercury Shrunk?

Sarah Stanley, Science Writer by Sarah Stanley 13 August 202513 August 2025

Mercury is still shrinking as it cools in the aftermath of its formation; new research narrows down estimates of just how much it has contracted.

A person wearing sunglasses uses a remote control to drive a chest-height, six-wheeled rover on dirt.
Posted inFeatures

Tanya Harrison: Roving on Mars

by Matthew R. Francis 28 July 202528 July 2025

This planetary geologist has worked on nearly every Mars rover while connecting government, universities, the private sector, and the public.

A scientist stands behind a camera on a tripod in front of a short patch of wavy sand in an orange desert.
Posted inNews

Mini Dunes Form When Sand Stops Bouncing

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 11 June 20259 June 2025

Decoding how sand grains move and accumulate on Earth can also help scientists understand dune formation on Mars.

A view from above of a set of interlocking ridges running through a landscape.
Posted inNews

Cracks on Planetary Surfaces Hint at Water

Katherine Kornei, Science Writer by Katherine Kornei 17 April 202517 April 2025

Imagery of fractured terrain on Venus, Mars, and Jupiter’s moon Europa pinpoints environments influenced by water.

Big chamber where scientists were able to conduct the mud experiments
Posted inNews

Salt May Be Key to Martian Mudflows

by Larissa G. Capella 9 April 2025

Mars probably has mud volcanoes, and salt might be the ingredient that keeps the flow going.

Heavily cratered surface of the Moon with two linear valleys radiating from a large central crater
Posted inNews

Impact Spewed Debris Away from the Moon’s South Pole

by Jonathan O’Callaghan 1 April 20251 April 2025

Two valleys extending away from a giant crater suggest that upcoming Artemis missions are more likely to sample ancient lunar terrain than impactor material.

A reddish planet appears with a blue ocean covering most of its upper half
Posted inNews

Buried Sediments Point to an Ancient Ocean on Mars

Katherine Kornei, Science Writer by Katherine Kornei 26 March 202526 March 2025

Ground-penetrating radar data collected by the Zhurong rover reveal gently sloping sediments in Mars’s northern lowlands that hint at a shoreline.

Posts pagination

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

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30 September 202630 September 2026
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