Astronomers have identified a new kind of cosmic explosion extreme nuclear transients so powerful they outshine typical ...

Supermassive black holes that seem too large to exist in the early universe may have grown from primordial black holes formed ...

A curious cow watches as NASA astronauts Andre Douglas and Kate Rubins perform a simulated moonwalk in the San Francisco ...

New NASA breakthroughs in space observation reveals black holes firing jets at nearly light speed and ancient cosmic events ...

Using NASA's Chandra spacecraft and ESA's XMM-Newton satellite, astronomers have investigated the galaxy NGC 7793, searching ...

Ancient supernovas may have blasted Earth with powerful radiation, causing dramatic changes in our climate, and could do so ...