Dennis Overbye

Astronomers have gotten better at tracking the motions of stars just beyond the solar system. But that’s made it harder to predict Earth’s future and reconstruct its past.

Scientists may have discovered a major flaw in their understanding of that mysterious cosmic force. That could be good news for the fate of the universe.

The late Jay Pasachoff inspired generations of students to become astronomers by dragging them to the ends of the Earth for a few precarious moments of ecstasy.

The Higgs boson was named for him. It was a key element of the Standard Model, which encapsulated all human knowledge so far about elementary particles.

A new map of the center of the Milky Way galaxy reveals details of its magnetic fields

Astronomers have found the earliest and most distant galaxy yet.

For the 25th anniversary of the Chandra X-ray Observatory, NASA produced ghostly time-lapse videos of two centuries-old stellar explosions.

Palomar Observatory bids farewell to a tradition of napkin rings, cowbells and astronomical table conversation.

A musical about particle physics is under development, with David Henry Hwang, the playwright behind “M. Butterfly.”

Astronomers have discovered a black hole emitting energy in jets longer than the width of 140 Milky Way galaxies.