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planetary evolution

Composite image of the farside of the Moon, a gray surface heavily marked with craters.
Posted inNews

Primordial Impact May Explain Why the Moon Is Asymmetrical

by Matthew R. Francis 6 February 20266 February 2026

Analysis of surface samples from the Chang’e-6 mission suggests that an asteroid may have vaporized parts of the lunar mantle, suppressing volcanic activity on the farside of the Moon.

Digital painting of a glowing red planet orbiting close to a yellow star.
Posted inNews

Planet-Eating Stars Hint at Earth’s Ultimate Fate

by Matthew R. Francis 2 December 20252 December 2025

A sampling of aging Sun-like stars demonstrates that they likely eat their closest planets.

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.

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.

An image of the Milky Way, as seen from the Chilean desert.
Posted inNews

Zircon Crystals Could Reveal Earth’s Path Among the Stars

by Tom Metcalfe 10 October 202510 October 2025

Researchers found signs of melting in zircon crystals in the crust that correspond to our planet’s journey through the galaxy’s spiral arms.

Protoplanetary disk around the star HL Tauri
Posted inNews

Planets Might Form When Dust “Wobbles” in Just the Right Way

by Jonathan O’Callaghan 6 October 20256 October 2025

A liquid metal experiment has shown how magnetic rotational instability might allow dust to pool together in disks around young stars to form new worlds.

An illustration of a swirling disk of gas and dust around a small, bright star.
Posted inNews

Tilted Planet System? Maybe It Was Born That Way

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 17 September 202517 September 2025

New observations could shed light on the degree to which misalignment in a planet-forming disk contributes to skewed planetary orbits.

A comet with a compact coma and a short tail in front of a background of stars.
Posted inFeatures

How an Interstellar Interloper Spurred Astronomers into Action

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 9 September 202510 February 2026

Valuable lessons from previous interstellar objects allowed scientists to develop a more rapid response when the third one arrived in July.

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.

An illustration of an orange-yellow star releasing a massive flare and stellar material along a magnetic loop that connects with a nearby red planet that is outgassing its atmosphere.
Posted inNews

Exoplanet Triggers Stellar Flares and Hastens Its Demise

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 5 August 20255 August 2025

HIP 67522 b can’t stop blasting itself in the face with stellar flares, a type of magnetic interaction that scientists have spent decades looking for.

Posts pagination

1 2 3 … 13 Older posts
Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

Features from AGU Publications

Research Spotlights

Making a Map to Make a Difference

11 February 202611 February 2026
Editors' Highlights

Rocky Shore Erosion Shaped by Multi-Scale Tectonics

16 February 202613 February 2026
Editors' Vox

A Double-Edged Sword: The Global Oxychlorine Cycle on Mars

10 February 202610 February 2026
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