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 ...

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

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

Scientists are unraveling the mysteries of "steam worlds"—exoplanets known as sub-Neptunes that are rich in water but orbit ...

A detailed study of a cosmic mystery known as "The Accident" has now provided new insight into the formation of clouds on ...

Astronomers have discovered the raw ingredients of planets orbiting two infant stars, offering a glimpse into how new worlds ...

Flowing water suggests that water ice may have survived in the asteroid for longer than what was thought possible.

Who hasn't looked into the sky and wondered if there's life out there, somewhere, looking back at us? Is it possible there's ...