A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding ...

Our Milky Way galaxy may not have a supermassive black hole at its center but rather an enormous clump of mysterious dark ...

If the pulsar is confirmed, it could enable more precise measurements of the space-time around the galaxy’s central supermassive black hole ...

For decades, the motions of stars near the center of our Milky Way Galaxy have been treated as some of the clearest evidence ...