Gravitational waves stretch and squeeze the fabric of space and time itself. When space/time is squeezed, pulsar pulses ...

"We would need to consider the possibility that the source was created (or trapped as a primordial black hole) by a highly advanced technological civilization," Harvard's Avi Loeb writes.

A new quantum recipe for black holes could be the first step toward a theory of "quantum gravity", the "holy grail" of ...

NASA, ESA, and ground observatories have detected powerful space explosions caused by black holes tearing apart massive stars ...

A newly discovered radio halo, 10 billion light-years away, reveals that galaxy clusters in the early universe were already steeped in high-energy particles. The finding hints at ancient black hole ...

Scientists have discovered the farthest-ever 'mini-halo,' a sea of charged particles around a distant galaxy cluster that ...

Supermassive black holes usually lurk unseen, but when an unlucky star drifts too close they ignite titanic outbursts ...

A supermassive black hole located 1.2 billion light-years away shows signs of intense activity. Observations reveal matter ...

One of the most perplexing discoveries in modern astronomy has been finding supermassive black holes, some weighing billions ...