The LIGO, Virgo, and KAGRA gravitational-wave observatories have added 161 new compact-binary merger candidates to the ...

A black hole shredded a massive star in a record-breaking explosion, but what astronomers discovered afterward may be even ...

When two black holes orbit each other, they eventually spiral inward and collide in one of the most violent phenomena in the ...

A piece of orbital debris smaller than a marble can punch through a working satellite at speeds exceeding 10 kilometers per ...

When massive stars die, they unleash some of the most powerful explosions in the universe. Yet not all supernovae are created ...

The Earth is four and a half billion years old, so why they started appearing then is unknown, as is the mechanism to make ...

NASA is lighting the cosmos in red, white and blue in honor of the 250 t h birthday of the United States—and the show even ...