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Space Telescope Blog

Deep dives on space telescopes - JWST, Hubble, Chandra, and what comes next.

JWST image showing GN20, a massive gas-rich dusty starburst galaxy at z=4.055 hosting a newly discovered 7-kiloparsec stellar bar.
Cosmology

JWST Unveils a 7-Kiloparsec Stellar Bar in GN20, Challenging Early-Universe Models

The James Webb Space Telescope has discovered a 7-kiloparsec stellar bar in the distant galaxy GN20, challenging existing models of early-universe galaxy formation.

3 min read