quasar

Scientists may have detected the first known 'transitioning red quasar' in the universe, dating to just 750 million years after the Big Bang.

Could gas escaping the gravitational grasp of supermassive black holes be forming "tsunamis" in space?

Astronomers just detected two pairs of rare 'double quasars' about 10 billion light-years away. They are the oldest in the known universe.

Astronomers have found the farthest known source of radio emissions in the universe: a galaxy-swallowing supermassive black hole.

In 2018, one of the brightest X-ray lights in the sky went dark, and scientists still aren't sure why.

The winds and radiation blowing out of quasars — the most energetic objects in the universe — can kill star formation galaxy-wide, new research shows.

Dark energy is even more mysterious than astronomers had thought, a new study suggests.

The fastest growing black hole in the known universe eats a mass the size of the sun every two days.

An enormous gas cloud in the early universe has a very small amount of the heavy elements that would form in later stellar generations, suggesting that it was "polluted" by the very first stars.