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

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

The scientists who precisely measure the position of Earth are in a bit of trouble. Their measurements are essential for the ...

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

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

Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

And, scientists with the National Aeronautics and Space Administration (NASA) have detected what they like to call a ...