A person falling into a black hole and being stretched while approaching the black hole’s horizon. Credit: Leo Rodriguez and Shanshan Rodriguez, CC BY-ND
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They can vary by size and be electrically charged, the same way electrons or protons are in atoms. Some black holes actually spin. There are two types of black holes that are relevant to our discussion. The first does not rotate, is electrically neutral – that is, not positively or negatively charged – and has the mass of our Sun. The second type is a supermassive black hole, with a mass of millions to even billions times greater than that of our Sun.
Many things are taking place:
We can enter a black hole, but it will be a lonely journey, Science News | wionews.com
Many have wondered whether an astronaut can enter a black hole. Now it appears he can, but it will be the loneliest journey ever undertaken
Black holes are intriguing indeed. Who wouldn't like to marvel at these space bodies that do not even let light escape? Ranks of scientists from Albert Einstein to Stephen Hawking have studied black holes but they remain to be completely understood. Scientists continue to study black holes.
Stellar-sized black holes are roughly the size of the Sun while supermassive black holes can have a mass equal to four million Suns.
Black Holes Simulated in a Tank of Water Reveals "Backreaction" for the First Time -
It’s hard to make a black hole in the lab. You have to gather up a bunch of mass, squeeze it until it gravitationally collapses on itself, work, work, work. It’s so hard to do that we’ve never done it. We can, however, make a simulated black hole using a tank of water, and it can tell us interesting things about how black holes work.
Water simulations of black holes are possible because the mathematics that describes the behavior of water is similar to the mathematics that describes the behavior of things like gravitational waves. Gravitational interactions occur in fluid-like ways, so you can use a fluid to study them. There are limitations to these water models, however, so you need to be careful when studying water simulations.
Scintillating discovery: these distant 'baby' black holes seem to be misbehaving — and experts
Kathryn Ross receives funding from the Australian Research Training Program (RTP), funded by the Australian Government.
Dr Natasha Hurley-Walker is supported by an Australian Research Council Future Fellowship (project number FT190100231), funded by the Australian Government.
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Radio images of the sky have revealed hundreds of "baby" and supermassive black holes in distant galaxies, with the galaxies' light bouncing around in unexpected ways.
This may worth something:
Aliens could be sucking energy from black holes. That may be how we'll find them. | Space
Aliens could be sucking power from black holes — and that could be how we'd spot the extraterrestrials, scientists say.
The co-author of the study, astrophysicist Luca Comisso of Columbia University in New York, said the next step will be to figure out what deliberate extraction energy from a black hole might look like to distant observers.
"We have only done the physics in this paper," he said. "But I am now working with a colleague of mine to apply this to reality, to look for civilizations, to try to see what kind of signal you would need to look for."
'Marvelous And The Black Hole' Review: Fresh-Faced but Familiar - Variety
A young girl forms an unlikely bond with an eccentric magician in this predictable but gently winning and peppily performed coming-of-ager.
Not quite adult enough to be young adult, and not quite a children’s film either, Kate Tsang ’s “ Marvelous and the Black Hole ” is a sweet-natured throwback, the kind of film a parent might wish their young teen would watch, rather than whichever dystopian franchise or fanfic adaptation they’re currently involved with.
Can Humans Enter Black Holes? | Black Hole Facts, Theories
In a new finding ripped from Interstellar , s cientists say humans can indeed explore black holes firsthand. The catch? If you're going to jump into a black hole, don't plan on ever jumping back out into our universe.
Because supermassive black holes are much bigger than stellar and intermediate black holes, all the parts of them are more spread out. A person falling in would make it to the event horizon—the border of the black hole beyond which not even light can escape, and where gravity is so strong that light will orbit the black hole like planets orbit stars—a lot sooner than in a smaller black hole.
The Beginning to the End of the Universe: How black holes die | Astronomy.com
Right now, the universe is in its Stelliferous Era, when stars and galaxies are continuously being born. Eventually, the ingredients to make these objects will be used up, and the stars in the night sky slowly will wink out, leaving black holes as the universe’s only occupants.
But even the black holes will one day die. And when they do, these monsters won’t go gently into the night.
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But don’t expect a black hole to disappear any time soon. It takes a shockingly long time for a black hole to shed all of its mass as energy via Hawking radiation. It would take 10100 years, or a googol, for a supermassive black hole to fully disappear. “The entire age of the universe [is] a fraction of [the time] it would take,” says Priyamvada Natarajan, a researcher at Yale University who probes the nature of black holes.
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