A team of astronomers have found a mysterious object in the distant universe that could be dark matter or an inactive smaller ...

The object was detected by observing how its gravity distorts light behind it. Astronomers have discovered an extremely faint ...

How heavy is the Milky Way galaxy? It may seem impossible to get a sense of it from our tiny little planet, but astronomers have their ways. Now a team has used data from Hubble and the Gaia satellite ...