The spiral galaxy M61, mistaken for a comet by Charles Messier in 1779, is an anchor tenant of the Virgo galaxy cluster, a beehive of star birth with a massive nuclear cluster and a supermassive 5-million-solar-mass black hole at its core. It is classified as a starburst galaxy with an active galactic nucleus. One of the largest members of the Virgo Cluster, an assembly of more than a thousand galaxies that, in turn, is part of the Virgo Supercluster, M61 is easily visible in amateur instruments despite its 50 million light year distance. But the galaxy’s full glory is revealed in larger instruments, like this shot captured by the European Southern Observatory in 2019.
ESO’s VISTA survey telescope has spied a horde of previously hidden massive galaxies that existed when the universe was in its infancy. By discovering and studying more of these galaxies than ever before, astronomers have, for the first time, found out exactly when such monster galaxies first appeared.
The Sculptor Dwarf Galaxy, pictured in this new image from ESO’s La Silla Observatory, is a close neighbour of the Milky Way. This galaxy is much smaller and older than ours, making it a valuable subject for studying both star and galaxy formation in the early universe. However, due to its faintness, studying this object is no easy task.