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planetary evolution

A green laser beam streams between two parts of a cylindrical instrument.
Posted inFeatures

Earth’s Core Is in the Hot Seat

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 24 June 202019 August 2022

How old is Earth’s inner core? High-pressure and high-temperature experiments suggest that our planet’s inner furnace may be much younger than expected.

Artist’s depiction of the MAVEN spacecraft orbiting Mars
Posted inNews

A Longer-Lived Magnetic Field for Mars

Javier Barbuzano, Science Writer by Javier Barbuzano 1 June 202013 March 2023

New research indicates Mars’s dynamo may have been active for millions of years longer than previously thought.

Illustration of Jupiter’s magnetosphere and innermost planets
Posted inResearch Spotlights

Two Moons and a Magnetosphere

Sarah Stanley, Science Writer by Sarah Stanley 21 April 202018 October 2022

Decades of research have illuminated how Io and Europa shape—and are shaped by—Jupiter’s giant magnetosphere.

two-color composite image of 2I/2019 Borisov
Posted inNews

Interstellar Interloper Borisov Looks Like a Regular Comet, for Now

Nola Taylor Redd, Science Writer by Nola Taylor Tillman 4 October 201927 March 2023

A first look at the chemical composition of the interstellar comet Borisov reveals ingredients that look a lot like those found in solar system comets. That’s not likely to last very long.

Composite satellite images of Jupiter’s Galilean moons: Io, Europa, Ganymede, and Callisto
Posted inNews

Jupiter’s Galilean Moons May Have Formed Slowly

Mara Johnson-Groh, Science Writer by Mara Johnson-Groh 30 September 201922 July 2024

A new model is the first to simultaneously explain many of the moons’ characteristics, including their mass, orbits, and icy composition

A red-orange star with dark circles in front
Posted inNews

Hunting for Planets Around Old, Anemic Stars

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 28 August 20193 April 2023

Can a star make planets with 10% of what the Sun had to work with? A synergy between two powerhouse survey telescopes is helping astronomers find that answer.

A rocky planet near a red star with two stars in the background
Posted inNews

Nearest Star System May Have a Second Planet

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 19 August 20193 April 2023

The exoplanet candidate, tentatively named Proxima c, would be a frozen snowball.

Illustration of oblong planet in front of bright star
Posted inNews

Ultrahot Exoplanet Bleeds Heavy Metals into Space

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 5 August 201931 October 2022

The planet is also shaped like a football (the American kind).

Images of blue circles around the yellowballs
Posted inNews

The “Yellowball” Catalog and the Citizen Science That Helped Define It

Rachel Crowell, Science Writer by Rachel Crowell 26 July 20195 January 2023

The online community of the Milky Way Project citizen scientists helped scientists identify compact star-forming regions now known as yellowballs.

Satellite image of a moon and rings of Saturn
Posted inNews

The Cassini Mission May Be Over, but New Discoveries Abound

Sarah Derouin, Science Writer by Sarah Derouin 17 July 201917 February 2023

New analysis of high-resolution images shows ring textures and disruptions within Saturn’s rings in unprecedented detail.

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18 September 202518 September 2025
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Unexpected Carbonate Phase Revealed by Advanced Simulations

25 September 2025
Editors' Vox

How Glacial Forebulges Shape the Seas and Shake the Earth

23 September 202519 September 2025
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