A mysterious phenomenon at the center of our galaxy could be the result of a different type of dark matter. A mysterious phenomenon at the centre of our galaxy could be the result of a different ...

This was the birth of our modern universe of galaxies, so poetically celebrated in Seeing in the Dark. Today, astronomers have measured the distance to the Andromeda Galaxy much more precisely ...

New research suggests that they could hold giant "dark stars," or invisible clumps of matter. Most of the mass in any galaxy is invisible, so astronomers do not yet know the identity of the dark ...