The first catalogue of more than a billion stars from ESA's Gaia satellite was published today – the largest all-sky survey of celestial objects to date.
The discovery of two massive holes punched through a stream of stars could help answer questions about the nature of dark matter, the mysterious substance holding galaxies together.
Using the world's most powerful telescopes, an international team of astronomers has found a massive galaxy that consists almost entirely of dark matter.
If you're expecting to hear from aliens from across the universe, it could be a while.
It's about 660 million times as massive as our sun, and a cloud of gas circles it at about 1.1 million mph.