“He was very taken with the thought that no phenomenon becomes a true phenomena until it has been observed,” Wald told Salon ...

The universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous—and highly ...

Found less than a billion years after the Big Bang, these massive objects are upending astronomers’ timeline for how early galaxies formed.

NASA's Chandra and NuSTAR telescopes have teamed up to study a supermassive black hole-powered quasar that could have played ...

Recent research has unveiled a troubling and persistent mystery at the heart of modern cosmology: the universe is expanding ...

But researchers have used the James Webb Space Telescope, a collaboration of NASA and its European and Canadian space ...

According to new research, the earliest seeds of structures may have been laid down by gravitational waves sloshing around in ...

The James Webb Space Telescope has spotted one of the earliest and most distant supernovas, marking the death of a stellar ...