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planetary evolution

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.

A large red orb partially covers a smaller blue-white orb against a dark, starry background.
Posted inNews

A New Exoplanet Resets the Scale

Damond Benningfield, Science Writer by Damond Benningfield 30 June 202530 June 2025

TOI-6894 b, the largest exoplanet relative to its host star yet seen, doesn’t fit the most widely accepted formation model for giant worlds.

Illustration of two large, cratered rocks in the foreground right. Another rock is seen in the distance to the left. The black background of space shows the hazy Sun and zodiacal light due to dust in the solar system, as well as scattered distant stars. The words “Artist’s Concept” appear in gray at the bottom left.
Posted inNews

Distant Icy Twins Might Actually Be Triplets

by Matthew R. Francis 18 April 202518 April 2025

The trans-Neptunian object Altjira, 44 times farther from the Sun than Earth is, could be the second known trinary, confirming a theory about the formation of our solar system.

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.

Una cuadrícula muestra imágenes de 74 anillos brillantes de diversas formas, tamaños y ángulos.
Posted inNews

Cinturones polvorientos ofrecen una visión más clara de la formación de exoplanetas

Damond Benningfield, Science Writer by Damond Benningfield 31 March 202531 March 2025

Las observaciones en longitudes de onda milimétricas de polvo y guijarros en 74 sistemas estelares sugieren que las migraciones planetarias podrían ser más comunes de lo que pensábamos.

A grid shows images of 74 bright rings of various shapes, sizes, and angles.
Posted inNews

Dusty Belts Provide Clearer Insights into Exoplanet Formation

Damond Benningfield, Science Writer by Damond Benningfield 18 February 202518 February 2025

Millimeter-wavelength observations of dust and pebbles in 74 star systems hint that planetary migrations might be more common than we realized.

Images of Pluto and Charon on a black background.
Posted inNews

Pluto Captured Charon with a Kiss

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 30 January 202530 January 2025

A newly understood collision mechanism could explain some peculiarities of Pluto and its moons.

Artist’s illustration of a star with a small dark dot and a cone of translucent dust in front of it
Posted inNews

Scientists Finally Get a Good Look at a Disintegrating Exoplanet

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

The James Webb Space Telescope offers astronomers a rare glimpse into the chemical composition of a rocky planet’s interior—and the results are “very surprising.”

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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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Research Spotlights

Sea Turtles, Shrinking Beaches, and Rising Seas

16 March 202616 March 2026
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Trees Shed Their Leaves to Adapt to Droughts

20 March 202620 March 2026
Editors' Vox

Rates of Mineral Dissolution from the Flask to Enhanced Weathering

20 March 202619 March 2026
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