The vast majority of matter is dark – invisible until it is detected only through its gravitational effects. The newly discovered object could be a clump of dark matter, or it could also be a compact, ...

A tiny object half a universe away, a scar in a stream of stars circling the Milky Way, and an unusual star cluster in a nearby satellite galaxy may not seem related at first glance. Yet a new study ...

When you look up at the night sky, the stars seem infinite and impossibly distant. But what you’re seeing represents only the tiniest fraction of what exists in our universe. Beyond our solar system ...