Astronomers in the Netherlands have spotted a new example of an early phase galaxy cluster merger, that is linked by a bridge of X-rays. Less than a handful of early phase cluster mergers have been observed, making this a rare opportunity to witness...
...refer to a group of very young galaxies that will merge together to form a galaxy cluster. Despite their huge size, protoclusters ... densest regions of galaxies. These results suggest therefore that mechanisms other than galactic mergers may be needed...