БЛОГ

Archive for the ‘cosmology’ category: Page 200

Mar 11, 2022

Supercomputers Simulated a Black Hole And Found Something We’ve Never Seen Before

Posted by in categories: cosmology, supercomputing

While black holes might always be black, they do occasionally emit some intense bursts of light from just outside their event horizon. Previously, what exactly caused these flares had been a mystery to science.

That mystery was solved recently by a team of researchers that used a series of supercomputers to model the details of black holes’ magnetic fields in far more detail than any previous effort. The simulations point to the breaking and remaking of super-strong magnetic fields as the source of the super-bright flares.

Scientists have known that black holes have powerful magnetic fields surrounding them for some time. Typically these are just one part of a complex dance of forces, material, and other phenomena that exist around a black hole.

Mar 11, 2022

Black Holes Vs Wormholes Explained — Are they Related? 4K

Posted by in categories: cosmology, time travel

Wormhole vs Black hole? Which one do you prefer? Most importantly which one truly exists?

Why don’t you watch this video and find out because the information will shock you! Today you’ll FINALLY find out if you can in reality TIME TRAVEL!

Continue reading “Black Holes Vs Wormholes Explained — Are they Related? 4K” »

Mar 11, 2022

What’s On The Other Side Of A Black Hole?

Posted by in categories: cosmology, mapping

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE
↓ More info below ↓

Sign Up on Patreon to get access to the Space Time Discord!
https://www.patreon.com/pbsspacetime.

Continue reading “What’s On The Other Side Of A Black Hole?” »

Mar 7, 2022

Astronomers See an Enormous Shockwave — 60x Bigger Than the Entire Milky Way Galaxy

Posted by in categories: cosmology, particle physics

Astronomers have a thing for big explosions and collisions, and it always seems like they are trying to one-up themselves in finding a bigger, brighter one. There’s a new entrant to that category – an event so big it created a burst of particles over 1 billion years ago that is still visible today and is 60 times bigger than the entire Milky Way.

That shockwave was created by the merger of two galaxy clusters to create a supercluster known as Abell 3667. This was one of the most energetic events in the universe since the Big Bang 0, according to calculations by Professor Francesco de Gasperin and his time from the University of Hamburg and INAF. When it happened over 1 billion years ago, it shot out a wave of electrons, similar to how a particle accelerator would. All these years later, those particles are still traveling at Mach 2.5 (1500 km/s), and when they pass through magnetic fields, they emit radio waves.

Mar 6, 2022

Detailed Supercomputer Simulation of the Universe Creates Structures Very Similar to the Milky Way

Posted by in categories: cosmology, evolution, physics, supercomputing

In their pursuit of understanding cosmic evolution, scientists rely on a two-pronged approach. Using advanced instruments, astronomical surveys attempt to look farther and farther into space (and back in time) to study the earliest periods of the Universe. At the same time, scientists create simulations that attempt to model how the Universe has evolved based on our understanding of physics. When the two match, astrophysicists and cosmologists know they are on the right track!

In recent years, increasingly-detailed simulations have been made using increasingly sophisticated supercomputers, which have yielded increasingly accurate results. Recently, an international team of researchers led by the University of Helsinki conducted the most accurate simulations to date. Known as SIBELIUS-DARK, these simulations accurately predicted the evolution of our corner of the cosmos from the Big Bang to the present day.

In addition to the University of Helsinki, the team was comprised of researchers from the Institute for Computational Cosmology (ICC) and the Centre for Extragalactic Astronomy at Durham University, the Lorentz Institute for Theoretical Physics at Leiden University, the Institut d’Astrophysique de Paris, and The Oskar Klein Centre at Stockholm University. The team’s results are published in the Monthly Notices of the Royal Astronomical Society.

Mar 6, 2022

NASA Just Saw Something Come Out Of A Black Hole For The First Time Ever

Posted by in category: cosmology

You don’t need to be an expert in science to understand that black holes often pull things in rather than spit them out. However, NASA has just discovered something quite weird around the supermassive black hole Markarian 335.

Mar 6, 2022

Scientist Finds ‘Evidence’ of Another Universe Before This One

Posted by in categories: cosmology, physics

“The next universe will be just like ours — but only in overall appearance, not in detail, of course…”

A researcher may just have discovered conclusive evidence that another cosmos existed before this one. Not only that, but he also claims that ours is just the latest in an infinite series of universes. Professor Sir Roger Penrose argues that our known cosmos is the latest in a long line of previous universes, answering the question of what was ‘there’ before the Big Bang.

Continue reading “Scientist Finds ‘Evidence’ of Another Universe Before This One” »

Mar 4, 2022

Earth’s closest black hole may actually be a vampire star

Posted by in category: cosmology

This may not be a black hole, but it is a vampire star.


Two years after finding the closest black hole to Earth, astronomers are now reporting that it may be a two star system instead.

Mar 4, 2022

What’s Inside a Black Hole? Quantum Computers May Be Able to Simulate It

Posted by in categories: cosmology, information science, quantum physics, robotics/AI

Both quantum computing and machine learning have been touted as the next big computer revolution for a fair while now.

However, experts have pointed out that these techniques aren’t generalized tools – they will only be the great leap forward in computer power for very specialized algorithms, and even more rarely will they be able to work on the same problem.

Continue reading “What’s Inside a Black Hole? Quantum Computers May Be Able to Simulate It” »

Mar 3, 2022

Dark energy: Neutron stars will tell us if it’s only an illusion

Posted by in categories: computing, cosmology, mathematics

A huge amount of mysterious dark energy is necessary to explain cosmological phenomena, such as the accelerated expansion of the Universe, using Einstein’s theory. But what if dark energy was just an illusion and general relativity itself had to be modified? A new SISSA study, published in Physical Review Letters, offers a new approach to answer this question. Thanks to huge computational and mathematical effort, scientists produced the first simulation ever of merging binary neutron stars in theories beyond general relativity that reproduce a dark-energy like behavior on cosmological scales. This allows the comparison of Einstein’s theory and modified versions of it, and, with sufficiently accurate data, may solve the dark energy mystery.

For about 100 years now, general relativity has been very successful at describing gravity on a variety of regimes, passing all experimental tests on Earth and the solar system. However, to explain cosmological observations such as the observed accelerated expansion of the Universe, we need to introduce dark components, such as and , which still remain a mystery.

Enrico Barausse, astrophysicist at SISSA (Scuola Internazionale Superiore di Studi Avanzati) and principal investigator of the ERC grant GRAMS (GRavity from Astrophysical to Microscopic Scales) questions whether dark is real or, instead, it may be interpreted as a breakdown of our understanding of gravity. “The existence of dark energy could be just an illusion,” he says, “the accelerated expansion of the Universe might be caused by some yet unknown modifications of general relativity, a sort of ‘dark gravity’.”