JWST has found the oldest galaxy cluster ever, and studying it might give us some clues about the history of modern-day clusters.
Some of the smallest galaxies we know of live right next door to the Milky Way — but we’ve only just found them!
Brand new data could force us to re-think how galaxies form and evolve in the early Universe — but there’s no need to panic!
A group of galaxies — some rich in dark matter, and some lacking dark matter completely — could be explained by a violent, destructive event from their past.
Galaxies in the middle of clusters are usually huge, elliptical galaxies. So what is this spiral-shaped imposter doing here?