This may worth something:
In a first, astronomers watch a black hole's corona disappear, then reappear | MIT News
Astronomers at MIT and elsewhere watched a black hole's corona disappear, then reappear, for first time. A colliding star may have triggered the drastic transformation.
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It seems the universe has an odd sense of humor. While a crown-encrusted virus has run roughshod over the world, another entirely different corona about 100 million light years from Earth has mysteriously disappeared.
For the first time, astronomers at MIT and elsewhere have watched as a supermassive black hole's own corona, the ultrabright, billion-degree ring of high-energy particles that encircles a black hole's event horizon, was abruptly destroyed.
Rapid Changes Detected in a Black Hole May Explain Origin of the Most Energetic Radiation in the
Some of the most massive and distant black holes in the Universe emit an enormous amount of extraordinarily energetic radiation, called ‘gamma rays.’ This type of radiation occurs, for example, when mass is converted into energy during fission reactions that run nuclear reactors on Earth.
As a result of these collisions between light and matter, the energetic particles give almost all their momentum to the light rays and turn them into the gamma radiation that ends up reaching Earth.
A black hole circling a wormhole would emit weird gravitational waves | Science News
Gravitational wave detectors have already spotted mysterious black holes. But something even stranger might be next: wormholes.
Wormholes are hypothetical objects in which spacetime is curved into a tunnel that connects distant cosmic locales or potentially different universes ( SN: 8/5/13 ). From the outside, wormholes can appear similar to black holes. But while an object that falls into a black hole is trapped there, something that falls into a wormhole could traverse through it to the other side.
Many things are taking place:
What Would Happen if You Fell Into a Black Hole? | Discover Magazine
Sorry, science fiction fans. You can't actually survive a trip through a black hole. And if you tried to take a plunge into one, like Matthew McConaughey in the movie Interstellar , you'd be ripped apart long before you could find out what's on the other side.
To fully appreciate why you can't just swan dive or pilot your spaceship into a black hole, you must first understand the basic properties of these gravitational goliaths. Simply put, a black hole is a place where gravity is so strong that no light — or anything else, for that matter — can escape.
Black Hole Fails to Do Its Job, Unleashing a Remarkable Torrent of Star Formation
Galaxy clusters contain hundreds or thousands of galaxies pervaded by hot, X-ray emitting gas that outweighs the combined mass of all the galaxies. Ejections of material powered by a supermassive black hole in the cluster’s central galaxy usually prevent this hot gas from cooling to form vast numbers of stars. This heating allows supermassive black holes to influence or control the activity and evolution of their host cluster.
But what happens if that black hole stops being active? The galaxy cluster SpARCS104922.6+564032.5 (SpARCS1049 for short) located 9.9 billion light-years away from Earth is supplying one answer.
When a black hole doesn't swallow everything up, something remarkable happens — study
Black holes are known for being cosmically ruthless . These objects of compact mass swallow up surrounding material, and not even light can escape their strong gravitational pull.
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Astronomers have recently observed a rather passive black hole, one that does not affect its surroundings in a distant galaxy cluster. Rather than swallowing up material itself, the black hole's inactivity allowed for surrounding star formation to flourish.
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