Black Hole Archives - Page 3 of 5 -
If a black hole is Voldemort, a quasar is Sauron; Despite being concentrated in an area no larger than our solar system, one, single quasar can outshine our galaxy by a factor of 100, generating more energy in moments than the Sun ever will. However, the mechanism by which they are powered is remarkably simple: at the heart of every quasar is a black hole that has been turbocharged. At least, that’s the working theory anyway.
When you crush the Sun to the size of a small town and crush the Earth to the size of a peanut … you will know how big the black holes can be. This crazy black hole comparison will definitely blow your mind, hopely I was able to convey my fascination. Enjoy
The central regions of many glittering galaxies, our own Milky Way included, harbor cores of impenetrable darkness—black holes with masses equivalent to millions, or even billions, of suns. What is more, these supermassive black holes and their host galaxies appear to develop together, or “co-evolve.” Theory predicts that as galaxies collide and merge, growing ever more massive, so too do their dark hearts.
As you might know, the Milky Way Galaxy, in which we are all floating, has a black hole with a mass 4.5 million times bigger than that of our sun at its very center. So, when NASA says a documented occurrence in that vast pit of darkness “raises questions about the behavior of this giant black hole and its surrounding environment,” I get a little nervous.
A black hole is a large amount of matter squeezed into a tiny area with an enormous gravitational pull for its size. Many black holes form from dying giant stars that collapse in on themselves. But even as black holes, they continue to orbit and exert the same gravitational pull on objects around them. Not all scientists believe in black holes. But for those who do, the surprises just keep coming.
Quasars are the most luminous objects in the universe, beacons that shine across vast cosmological distances. They are galaxies that have particularly active supermassive black holes at their cores, objects surrounded by discs of extremely hot matter spiralling into oblivion and emitting bright beams of particles along their spin axes at nearly the speed of light.
Astronomers in the next year will be able to detect hundreds of black holes thanks to the brand new detectors of the Laser Interferometer Gravitational-Wave Observatory or LIGO, which is a new research by scientists from Cardiff University.
As galaxies mature, they stop forming stars — but why? Now astronomers are hot on the trail of finding the culprit. By now we know that the vast majority of galaxies have supermassive black holes in their cores. These galactic behemoths generate some energetic phenomena, especially when matter falls onto their accretion disks and event horizons.
A certain black hole is more insatiable than expected. The P13 is a black hole along the outer edge of the NGC7793 galaxy located around 12 million light years away from the Earth. It’s very luminous compared to others of its kind but as it turns out, this has nothing to do with the black hole’s size.
Black holes are so entwined in the established scientific narrative these days that it’s easy to forget that their existence is still completely theoretical.
Nestled in the heart of a tiny galaxy 54 million light years from Earth is a black hole so big it makes up 15% of the star cluster’s total mass.