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Astronomers Measure Mass of a Free-Floating Planet for the First Time

A two-hour offset between Earth and Gaia views of a microlensing event provided the parallax to pin down its distance and mass.

Record-Long Gamma-Ray Burst and Earliest-Known Supernova Challenge Models of Cosmic Explosions

Early JWST Campaign Finds Stellar Noise Hindering TRAPPIST-1e Atmosphere Test

Euclid Data Maps a Cooling Universe as Star Formation Declines

Hubble Spots White Dwarf Devouring Icy, Nitrogen-Rich Exo‑Pluto Fragment

NASA’s Confirmed Exoplanets Top 6,000

New UC Santa Cruz Model Explains JWST’s Steam‑Rich Sub‑Neptunes

Gas Giant HIP 67522 b Triggers Intense Stellar Flares, Accelerating Its Atmospheric Loss

Webb Telescope Confirms First Extraterrestrial Water Ice in Young Star System

Methane Clouds and Key Organic Molecule Detected on Titan

Discovery of Hidden Galaxies Challenges Current Models of Universe

Study Reveals Null Results in Exoplanet Surveys Can Sharpen Search for Extraterrestrial Life

Euclid Telescope Captures Rare Einstein Ring, Unlocking Dark Matter Insights

Euclid Telescope Uncovers Rare Einstein Ring in Nearby Galaxy