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Space & Planets

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 rover sits atop a rocky ridge on Mars, under pink skies.
Posted inNews

Sediments Hint at Large Ancient Martian Moon

Damond Benningfield, Science Writer by Damond Benningfield 20 November 202526 November 2025

Regular, alternating layers in Gale Crater may have been deposited as the result of tides raised by a moon at least 18 times the mass of Phobos, a study says.

The planet Venus appears as a circular shape against a black background, with the right side sharply defined but the far left side fading into shadow. White, gray, and light orange swirling shapes cover the surface, appearing whiter, more linear, and more solid at the top and bottom of the circle but patchier toward the middle, with more patches of gray and light orange.
Posted inResearch Spotlights

Key Driver of Extreme Winds on Venus Identified

Sarah Stanley, Science Writer by Sarah Stanley 19 November 202519 November 2025

A new study suggests that a once-daily atmospheric tidal cycle may be a bigger driver of rapid Venusian winds than previously thought.

Enceladus’s horizon backlit by the Sun, highlighting several plumes of material coming from the surface.
Posted inNews

Speedy Flyby Adds New Organics to Enceladus’s “Primordial Soup”

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 12 November 202512 November 2025

A new analysis of old Cassini data has also verified past detections of complex organics in Saturn’s E ring, strengthening the chemical ties between the ring and its progenitor.

A series of structures that look like electrical poles extend into the distance on an icy surface. The sky above is full of stars and streaked with green aurorae.
Posted inNews

A Weak Spot in Earth’s Magnetic Field Is Going from Bad to Worse

by Tom Metcalfe 10 November 202510 November 2025

This could be bad news for satellites and spacefarers.

A gray peanut-shaped asteroid with a rough, rocky surface.
Posted inNews

What Tumbling Asteroids Tell Us About Their Innards

by Matthew R. Francis 6 November 20256 November 2025

Data from the Gaia space observatory reveal that many slowly spinning asteroids rotate chaotically. A new theory links that chaos to their inner structure and history.

Three images of the Jovian moon Io show different distributions of colors. The far left image has a spot of red and yellow at bottom left, and the other two images each have a spot of red and yellow in the top half.
Posted inResearch Spotlights

Webb Telescope Spies Io’s Volcanic Activity and Sulfurous Atmosphere

Sarah Stanley, Science Writer by Sarah Stanley 4 November 20254 November 2025

New James Webb Space Telescope images reveal cooling lava, volcanic sulfur monoxide gas, and sulfur gas emissions created by interactions between plasma and the moon’s atmosphere.

Three dust devils on the Martian surface, seen from above and appearing as small white splotches.
Posted inNews

Martian Dust Devils Reveal Dynamic Surface Winds

Javier Barbuzano, Science Writer by Javier Barbuzano 28 October 202528 October 2025

A new wind map covering the whole of Mars includes some of the fastest winds ever detected on the Red Planet.

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.

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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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