Astronomers used the James Webb Space Telescope for the largest and deepest sample of galaxy groups, some of which were up to ...

The lack of blue clusters suggests that NGC 1277 never grew further by gobbling up surrounding galaxies. [Background image] -- The galaxy lives near the center of the Perseus cluster of over 1,000 ...

A massive galaxy cluster pictured by Hubble. Image source: ESA/Hubble & NASA, H. Ebeling / Acknowledgement: L. Shatz This has left several astronomers involved in the discovery baffled and ...