Science ❯ Astronomy ❯ Observational Astronomy

James Webb Space Telescope

Infrared Observations Galaxy Observations Spectroscopy Data Analysis Cosmic Discoveries JWST Discoveries Galaxy Formation NIRCam Observations COSMOS Field Extragalactic Surveys

JWST Studies Report Strongest Evidence Yet of Population III Stars Near GN‑z11

Independent preprints present metal‑free helium‑plus‑hydrogen signals near GN‑z11 matching models for massive first stars.

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

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

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

JWST Spots Most Distant ‘Jellyfish’ Galaxy Candidate at Redshift 1.156

JWST Spots Sulfur in HR 8799 c, Strengthening Case for Core Accretion

Webb Produces Sharpest Contiguous Map of Dark Matter in COSMOS-Web Field

JWST Finds Compact Five-Galaxy Merger From 800 Million Years After the Big Bang

JWST Produces Most Detailed Dark-Matter Map to Date

Webb Links Protostellar Bursts to Crystal Formation and Outflows in EC 53

Early-Universe Quasar Defies Models With 13 Times the Eddington Limit, Bright X-Rays and a Radio Jet

JWST and ALMA Reveal Early Massive Galaxy Quenched by Black Hole Starvation

Earliest Superheated Galaxy-Cluster Atmosphere Detected Challenges Formation Models

JWST Spots Most Distant Supernova Yet, Linked to 2025 Gamma-Ray Burst

JWST Reveals Pulsar-Orbiting ‘Lemon’ Planet With Helium–Carbon Atmosphere

Webb Reveals Carbon-Heavy, Helium-Rich ‘Lemon’ World Orbiting a Pulsar

Webb Finds Carbon-Rich Atmosphere on Lemon-Shaped Planet Orbiting a Pulsar

JWST Spots Record-Distant Supernova Tied to March Gamma-Ray Burst

Webb Data Point to Thick Atmosphere on Ultra‑Hot Super‑Earth TOI‑561 b

JWST Finds Twin Helium Tails Streaming From Hot Jupiter WASP-121b