Scientists have discovered a colossal water reservoir in space, containing as much water as 100 trillion times all the oceans ...

The star-studded halo in the new image is made up of light from a quasar — a supermassive black hole at the heart of a young ...

The spectroscopic signature of the light from background quasars shining through the clouds gives information about their motion. Quasar light is redshifted in clouds shooting up and away from the ...

Astronomers have identified the brightest object ever observed in the universe, a quasar named J0529-4351. This quasar is 500 trillion times brighter than the Sun, setting a new record for ...

Astronomer Charles Steidel of Caltech uncovered a mysterious elliptical galaxy lurking in front of the quasar, identified by unique absorption lines in its light. Unlike typical ellipticals ...

The composite image of NGC 1275, or Perseus A, reveals its dynamic structure by blending optical, radio, and X-ray data. Cygnus X-1, about 10,000 light-years away, is a powerful black hole pulling ...