Quasar

Japanese astronomers have discovered the echoes of a “dying” supermassive black hole. While the object is quiet now, the team spotted the signatures of two huge radio jets that indicate it only recently fell silent after a bright, active phase.

Astronomers have mapped out a huge invisible region of the galaxy next door. Hubble has detailed the size and structure of Andromeda's gas halo – and found that it’s already bumping up against that of the Milky Way, in advance of a cosmic collision.

A 20-year study of the sky has allowed astronomers to produce a comprehensive 3D map of the universe. A new analysis of this map has highlighted a mismatch in the Hubble Constant, and revealed when the expansion of the universe began to accelerate.

There are billions of tiny particles called neutrinos streaming through your body right now. But where did they come from? Researchers have now traced back some ultra-high energy neutrinos to their points of origin – radio flares from raging quasars.

Large clouds of dark matter have been indirectly detected before, but it should also form smaller clumps. Now Hubble observations have detected evidence of these small clumps for the first time, lending weight to a prevailing dark matter hypothesis.

Nowadays, the Milky Way is a pretty quiet galaxy – but just a few million years ago its central black hole sent off huge flares of radiation.

Astronomers have spotted an event that was thought to happen over millennia play out in a matter of months, as a usually-quiet galaxy suddenly fired up into an energetic quasar – and not just once, but in six different cases.

To look through space is to look through time. Astronomers on a 5-years survey have turned up 100 supermassive black holes from a time when they were thought to be rare, suggesting we might need to rewrite our understanding of their evolution.

The Sun is a mere 10-watt bulb compared to quasars, extremely luminous galactic cores that shine so intensely thanks to their ravenous hunger for nearby material. Now, astronomers have detected the brightest quasar ever found, shining with the light of almost 600 trillion Suns.

The galaxy W2246-0526 sits 12.4 billion light-years from Earth – almost the entire radius of the observable universe – and is the most luminous galaxy ever discovered, with the brightness of 350 trillion Suns. Now, astronomers have found that W2246-0526 is cannibalizing three neighboring galaxies.

Quantum entanglement is an eerie concept that Einstein himself had trouble accepting, and yet it’s been experimentally demonstrated. To find out whether there are other variables, a new experiment provides the strongest evidence so far of quantum entanglement or a 12-billion year “conspiracy."

Ordinary (or baryonic) matter is relatively rare in the universe, and there seems to be a huge chunk of it missing. After 20 years of scouring the sky, astronomers using the ESA’s XMM-Newton observatory have now found clues to this missing matter hiding in intergalactic gas.