James Webb Finds 12-Billion-Year-Old Galaxy With Zero Rotation, Defying Early-Universe Expectations
Updated
Updated · Universe Today · May 31
James Webb Finds 12-Billion-Year-Old Galaxy With Zero Rotation, Defying Early-Universe Expectations
1 articles · Updated · Universe Today · May 31
XMM-VID1-2075, seen 12 billion years ago when the universe was under 2 billion years old, shows stars moving randomly rather than in any coherent spin.
James Webb’s NIRSpec measurements found the most extreme case among three ancient galaxies studied: one rotated, one showed tangled motion, and XMM-VID1-2075 showed none at all.
The galaxy was already unusual because it is several times more massive than the Milky Way and had apparently already stopped forming new stars.
A head-on collision between two oppositely rotating galaxies is the leading explanation, with a bright off-center light source possibly marking a companion still being absorbed.
Simulations allow such non-rotating early galaxies but predict they should be extraordinarily rare, so finding more could force a rethink of galaxy-formation models.
How can a galaxy bigger than the Milky Way exist without any spin, defying known physics?
How is AI uncovering cosmic anomalies that could rewrite the history of galaxy formation?
JWST Uncovers a 330-Billion-Solar-Mass, Non-Rotating "Dead" Galaxy in the Early Universe, Forcing Rethink of Galaxy Formation Models
Overview
In May 2026, the James Webb Space Telescope revealed XMM-VID1-2075, a massive galaxy from when the universe was less than two billion years old. Surprisingly, this galaxy is already 'red and dead,' meaning it has stopped forming new stars, and it shows almost no rotation. This discovery is a major puzzle for astronomers because it challenges the idea that early galaxies should be spinning and actively making stars. The existence of such a non-rotating, mature galaxy so early in cosmic history forces scientists to rethink how galaxies formed and evolved in the young universe.