The race is on to harness the near-infinite power of nuclear fusion—by building a star on Earth. And scientists are closer ...

The most luminous kilonova candidate to date (short gamma-ray burst 200522A) was detected using the Hubble Space Telescope, Swift Observatory and other telescopes. A kilonova is a "the afterglow ...

The GWTC 4.0 catalog records 128 new gravitational wave signals, revealing mergers of black holes and neutron stars detected by LIGO.

After decades of searching, astronomers have imaged two supermassive black holes in orbit around each other at the heart of ...