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Planet Formation

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Astronomers Confirm Two Super‑Puff Jupiter‑Size Planets

Planned JWST observations will seek to confirm massive hydrogen‑helium envelopes, testing models for how such ultra‑low‑density giants form.

Webb Finds Salt Clouds Veiling the Atmosphere of GJ 504 b

JWST Finds Heavy, Water-Rich Atmosphere on Mini-Neptune in Rare Hot-Jupiter System

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

Study Ties Planetary Habitability to a Narrow Oxygen Window in Core Formation

Astronomers Find Rare ‘Inside-Out’ Planetary System With Rocky Outer World

Astronomers Make First Direct Mass Measurement of a Rogue Planet

Hubble Spots Record-Breaking, Chaotic Planet-Forming Disk ‘Dracula’s Chivito’

Hubble Spots Second Debris Cloud at Fomalhaut, Confirming Repeated Planetesimal Collisions

Hubble Spots Second Transient Light Near Fomalhaut as First Fades From View

Closest Directly Imaged Planet Around Two Suns Confirmed on a 300-Year Orbit

TOI-2267 Becomes First Binary With Planets Transiting Each Star

MIT-Led Team Finds Proto-Earth Signature Preserved in Deep Mantle After Moon-Forming Impact

Rogue Planet Caught in Record Growth Spurt, Accreting Like a Young Star

Rogue Planet Cha 1107-7626 Undergoes Record Accretion Burst Detected by JWST and VLT

Webb Makes First Direct Chemical Reading of a Moon-Forming Disk Around CT Cha b

Astronomers Directly Image Newborn Planet in Multi-Ringed Disk in First Clear Case

James Webb Uncovers Massive Early Galaxies and a Fading Exoplanet Candidate

Astronomers Capture Infant Planet Sculpting Spiral in HD 135344B’s Disk

Astronomers Observe First Solid Condensation of Rocky Planet Precursors Around Distant Star