Cosmology

During the cold war the U.S. found ways to work with the Soviet Union on space missions

The array could be the most complex and versatile radio telescope ever attempted, with the capacity to sweep the entire northern sky in 45 days for low-frequency radio waves

The ambitious Laser Interferometer Space Antenna, a casualty of tightening budgets, could rise again

The current census of middleweight black holes is incomplete in many ways. Additional studies will push astrophysicists' understanding of and search for middleweights in new directions

Giant low-frequency sensor system on track to probe the birth of the first stars.

Scientists hope that by plotting out the distribution of dark matter throughout space, they will come closer to understanding what it is

Result puts limit on how 'lumpy' space-time can be.

A new biography of Stephen Hawking by long-time acquaintance Kitty Ferguson explores the famous physicist's life and theories in honor of his 70th birthday

Orbital debris hits Earth daily, but NASA says not to worry

Tipping the scales at less than about a million suns in mass, middleweight black holes may hold clues to how their much larger siblings, and galaxies, first formed

The Milky Way seems to have too few galactic hangers-on, except when it comes to the big ones. What gives?

The supermassive black hole at our galaxy's center may be about to shred and consume a cloud of gas and dust the size of a planet