Cosmology

Resolving how the galaxy's halo of stars was assembled would provide important clues about galactic formation

An excerpt from physicist Lawrence M. Krauss's new book explains why we are not the center of the universe

Do we have autonomy, or are our choices preordained? Is that a false choice? And what, if anything, does physics have to say about that?

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

An experiment going up outside of Chicago will attempt to measure the intimate connections among information, matter and spacetime. If it works, it could rewrite the rules for 21st-century physics

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.