University of Virginia astronomy undergraduates focus on the shadows of asteroids and dwarf planets for their Earth-bound observations.

The sun has become increasingly active since 2008, a new NASA study shows. Solar activity is known to fluctuate in cycles of 11 years, but there are longer-term variations that can last decades. Case ...

While Mars today only has a wispy remnant of an atmosphere, it may once have had one hundreds of times thicker with a ...

The long-standing idea of planets forming in perfectly flat, orderly discs has been challenged by new research. Instead of ...

This quiz invites you to chase comets through time and space, from ancient omens to modern scientific marvels.

Three celestial bodies are preparing to meet up for one night in September in a cosmic conjunction that should be widely visible in the sky.

A sci-fi idea is gaining supporters, from billionaires to city councils. Whether it's feasible is another matter.

A team of scientists has investigated how Earth’s twin became so inhospitable, and whether the same will happen to our planet ...

Do we know what space actually smells like? And what about other planets, moons, and celestial bodies? Here's what the ...

Lasers aren't just useful for entertaining cats or pointing out features of PowerPoint slides. They can also drill holes on ...

The clear views of Saturn are because it will be making its closest pass to us here on Earth for 2025, giving us the clearest and brightest view we’ll get all year. It will be ‘in opposition’ this ...