#galaxy clusters

Content tagged "galaxy clusters".

2 items (2 articles, 0 stories)

Articles

When Gravity Itself Becomes a Telescope: The 'Too-Early' Cluster 10.4 Billion Light-Years Away

July 19, 2026

In 2026, JWST confirmed that the galaxy cluster XLSSC 122, some 10.4 billion light-years away, is producing powerful gravitational lensing. SORABUMI explains how a foreground cluster's gravity bends and magnifies light from behind it, and why this densely packed cluster shouldn't have existed so soon.

Stars and Galaxies #galaxy clusters#gravitational lensing#cosmic noon#XLSSC 122#JWST#cosmology

Galaxy Clusters Weigh Twice as Much as We Thought — Stellar Corpses Are to Blame

May 4, 2026

Galaxy clusters — the most massive objects in the universe — may contain roughly twice the baryonic mass astronomers have long assumed. The culprit is something no one bothered counting seriously: the accumulated remains of dead stars.

Stars and Galaxies #galaxy clusters#neutron stars#black holes#dark matter#large-scale structure