Possibly one of the best-known constellations in the northern sky, Ursa Major—or the Great Bear—contains an asterism of seven ...

"These two supernova remnants are helping us to better understand the dynamics of our home galaxy’s neighborhood," ...

Researchers say they've discovered the largest known object in the universe, a galactic superstructure called Quipu.

The Einstein ring, formed as light from a distant galaxy bends to glow around another object in the foreground, could help ...