Samantha Mathewson

Some of the brightest objects in the universe may also hold the key to understanding how galaxies evolve — especially when gravity transforms them into giant cosmic magnifying glasses.

A new analysis of NASA's Spirit rover data reveals overlooked traces of crystalline hematite and altered magnetite.

A new analysis of decades-old data from NASA's Spirit rover has uncovered overlooked traces of crystalline hematite and altered magnetite, adding to growing evidence that liquid water once played a ma...

While the impact itself probably won't be visible from Earth, observers may have a chance to spot a plume of debris rising above the lunar surface.

Astronomers have nearly doubled the number of known cosmic X-ray sources.

"It's part of the fabric of astronomy research now." Astronomers have released the largest two-dimensional map of the universe ever

Astronomers have nearly doubled the number of known cosmic X-ray sources.

Water and cosmic dust can survive in the harsh environment near Sagittarius A*, new observations reveal.

Spaceflight can do strange things to the human body — including making it harder for astronauts to poop.

"This isn't what we expected at all." Astronomers have discovered an unusually massive, dense exoplanet that challenges conventional ideas about how rocky planets form.