A tremendously large cloud that blocked the light from a distant star has been found to consist of swirling winds of ...

The huge 1,600-mile (2,500-kilometer) wide expanse of the South Pole–Aitken Basin extends considerably onto the far side of ...

Skygazers who look up at the moon tonight may be able to spot Saturn below it. Here's when and how to spot the conjunction.

New research suggests that essential components of life may assemble in interstellar space long before planets or oceans ...

Optical proof of a tiny companion orbiting supergiant star Betelgeuse is hard to come by. Hubble just spotted new evidence.