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Observational Astronomy

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JWST Spots Record-Low Metallicity in ‘Forbidden’ Giant Planet’s Atmosphere

The result challenges standard models for how giant planets grow around small red dwarf stars.

HETDEX Maps 33,000 Hydrogen Halos Around Early Galaxies

Astronomers Find Most Pristine Star Yet From the Large Magellanic Cloud

JWST Finds Metal-Poor Atmosphere on Giant Planet Around a Small Red Dwarf

Comet MAPS Skims the Sun on Saturday With Fate Uncertain

Sungrazer Comet MAPS Faces Make-or-Break Sun Brush April 4–5

Hubble Spots First Known Comet Spin Reversal

XRISM Confirms White Dwarf Powers Gamma Cassiopeiae’s Extreme X-Rays

Second Infant Planet Confirmed Forming Around Nearby Star WISPIT 2

Hubble Maps 25 Years of Expansion in the Crab Nebula

Hubble Accidentally Captures Comet C/2025 K1 Breaking Into Pieces in Rare Real-Time View

Study Traces Small Magellanic Cloud’s Odd Stellar Motions to Past Crash With the Large Magellanic Cloud

JWST Helps Reveal Sulfur-Rich Magma-Ocean World L 98-59 d

Ancient Star in Pictor II Bears the Imprint of One Weak First-Generation Supernova

Astronomers Publish Evidence of Planetary Collision Around Sun-Like Star

Nature Study Links Superluminous Supernova to Newborn Magnetar Through Relativistic 'Chirp'

Astronomers Tie Distant Star’s Chaotic Fading to Evidence of a Planetary Collision

Magnetar ‘Chirp’ Identified in Superluminous Supernova as Short GRB Localized to Tidal-Stream Dwarf

TESS Reveals Most Compact 3+1 Quadruple-Star System Yet

Astronomers Map 'Teenage' Planetary System TOI-2076, Revealing Photoevaporation at Work