James Webb has found something that should not exist: a stellar bar in a galaxy that is too young and gassy

James Webb data reveal a stellar bar in GN20, a massive, gas-rich galaxy in the early universe.

Researchers at Leiden confirmed the structure with isophotal analysis, independent calculations, and NOEMA observations.

The finding challenges ideas about when bars can form in young galaxies.

The study also suggests gas turbulence may help preserve the bar and influence galaxy evolution and black hole growth.