Exoplanète : mondes au-delà du système solaire

Rocky Outlier: A Planet That Breaks the Rules

Researchers find planet that upends the textbook 'rocky-inside, gaseous-outside' view of planetary systems; new data on LHS 1903 point to late, inside‑out formation and force mode… Fév 22, 2026

Space

Vanishing Planet: GJ 3470b's Disappearing Atmosphere

Hubble observations show the Neptune-sized exoplanet GJ 3470b leaking a giant hydrogen cloud and shedding mass at a record rate. Astronomers say the planet may be on a long path t… Jan 19, 2026

Space

Roman Telescope Assembled — Next Step in Alien Hunt

NASA has finished assembling the Nancy Grace Roman Space Telescope at Goddard, advancing hardware and techniques that could reshape the hunt for habitable worlds and biosignatures… Déc 17, 2025

Space

Nearby ‘Super-Earth’ Candidate GJ 251 c Found in Star’s Habitable Zone

Researchers report detection of GJ 251 c, a rocky super-Earth candidate orbiting within its star's habitable zone less than 20 light-years away. The planet is a promising target f… Nov 14, 2025

exoplanète

Articles about exoplanète

Rocky Outlier: A Planet That Breaks the Rules

Vanishing Planet: GJ 3470b's Disappearing Atmosphere

Roman Telescope Assembled — Next Step in Alien Hunt

Nearby ‘Super-Earth’ Candidate GJ 251 c Found in Star’s Habitable Zone