The orientation of merging black holes' spins helps reveal how the pair of black holes formed, and physicists have now probed the spin distribution statistically.
Less than 5 years ago, physicists rocked the scientific world when they first spotted gravitational waves —fleeting ripples in space and time—set off when two gargantuan black holes billions of light-years away swirled into each other. Since then, scientists have detected a scad of similar events, mostly reported event by event .
Quite a lot has been going on:
Black-hole clashes, US climate hope and COVID antibodies
The accord, struck in 2015, aims to limit global warming to "well below" 2 °C above pre-industrial temperatures. The US withdrawal was seen as a blow.
Biden, who was declared victor in the election by major media outlets on 7 November, has already indicated that his administration will rejoin the accord as soon as it takes office. The United States would again become a party to the deal 30 days after it notifies the United Nations climate-convention body. It would then need to submit a new emissions-reduction pledge for 2030; it had previously committed to reducing emissions by 26–28% below 2005 levels by 2025.
A scientist from Barnard College describes what happens when you fall into a black hole
There are any number of ways to perish from our mortal plane that might have particularly unpleasant sensations and ramifications, but plummeting into the angry maw of a light-swallowing supermassive black hole would have to top our list.
To help aid those of limited imaginations or unbridled fears of falling anywhere at anytime, noted astrophysicist and author Janna Levin of Barnard College in England has captured what this existence-ending nightmare might be like in her new book, Black Hole Survival Guide , which was recently reviewed in the BBC's Science Focus magazine and showcased an extended excerpt.
Black hole or no black hole: On the outcome of neutron star collisions
Neutron stars consists of highly compressed dense matter. The mass of one and a half solar masses is squeezed to the size of just a few kilometers. This corresponds to similar or even higher densities than in the inner of atomic nuclei. If two neutron stars merge, the matter is additionally compressed during the collision. This brings the merger remnant on the brink to collapse to a black hole.
"The critical parameter is the total mass of the neutron stars. If it exceeds a certain threshold the collapse to a black hole is inevitable," summarizes Dr. Andreas Bauswein from the GSI theory department. However, the exact threshold mass depends on the properties of highly dense nuclear matter. In detail these properties of high-density matter are still not completely understood, which is why research labs like GSI collide atomic nuclei—like a neutron star merger but on a much smaller
This may worth something:
Hundreds of copies of Newton's Principia found, how to cross stitch a black hole – Physics
I think few would argue that Isaac Newton's Philosophiae Naturalis Principia Mathematica is the most famous book ever written about physics. First published in 1687, the tome outlines Newton's laws of motion and universal gravitation – which underline much of modern physics.
Now, Caltech's Moti Feingold and Andrej Svorenčík of the University of Mannheim have scoured the planet for first-edition copies of Principia and discovered nearly 200 more than were previously listed in a census done in 1953. This brings the total of known first editions to 386, out of 600–750 copies that are believed to have been printed.
The Black Hole: Go Inside the Las Vegas Raiders VI
Final dance of unequal black hole partners -- ScienceDaily
Physicists began using supercomputers to obtain solutions to this famously hard problem back in the 1960s. In 2000, with no solutions in sight, Kip Thorne, 2018 Nobel Laureate and one of the designers of LIGO, famously bet that there would be an observation of gravitational waves before a numerical solution was reached.
He lost that bet when, in 2005, Carlos Lousto, then at The University of Texas at Brownsville, and his team generated a solution using the Lonestar supercomputer at the Texas Advanced Computing Center. (Concurrently, groups at NASA and Caltech derived independent solutions.)
Astronomers Discover First BL Lacertae Galaxy at Cosmic Dawn: The Farthest Black Hole From a Rare
“Since the speed of light is limited, the farther we look, the earlier in the age of the Universe we investigate,” says Alberto Domínguez from the Institute of Physics of Particles and the Cosmos (IPARCOS) at Universidad Complutense de Madrid and co-author of the study. The most distant FSRQ was identified at a distance when the age of the universe was merely a billion years.
However, the newly discovered BL Lac object with the catalog number 4FGL J1219.0+3653, is substantially farther away than the previous record holder. “We have discovered a BL Lac existing even 800 million years earlier, this is when the Universe was less than 2 billion years old,” reports co-author Cristina Cabello, a graduate student at IPARCOS.
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