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Here is What It Actually Looks Like When Two Black Holes Collide

What happens to a black hole when it collides with another black hole? This new model shows you closely. The question of just what could possibly happen when two black holes come across at a very very close distance is one that we have been involved with for a while.
But, even still we understand a little about how the whole procedure might go down in theory as the two black holes merge, what we actually haven't identified is how it would look like.
A new study paper displayed on ArXiv by a team of scientists directed by Cornell University's Andy Bohn proceeds on just that question. Although other efforts at picturing the procedure have done a good job, they haven't considered how the movement of light through space-time and the physics of visualization would come organized to generate the visual. Here is what the published paper says: “In this paper, we focus on the question of what an observer in the vicinity of a BBH would actually see as the black holes orbit, spiral inw…
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The Most Intense Cosmic Explosion Out There Has Been Captured as It Happened

The most powerful kind of cosmic explosions known to science are called gamma-ray bursts – aka 'death from space' – galactic events so fierce their awesome intensity is only surpassed by the Big Bang itself. Now, an international team of astronomers has observed one of these violent outbursts of energy in unprecedented detail, witnessing a distant, giant star in its destructive death throes like never before.
"Gamma-ray bursts are catastrophic events, related to the explosion of massive stars 50 times the size of our Sun," explains one of the researchers, Eleonora Troja from the University of Maryland. “In a matter of seconds, the process can emit as much energy as a star the size of our Sun would in its entire lifetime."
These intense flashes are thought to occur all the time, but thankfully they usually take place in galaxies billions of light-years away from Earth, sparing us from intense jets of particles thrust at the speed of light from collapsing stars. Bec…

Hyper-dense Pulsar May Nix Einstein's Theory of Gravity- New NRAO Discovery

The three-body arrangement is researchers’ best chance yet to learn a violation of a key idea in Albert Einstein’s theory of General Relativity: the strong equivalence principle, which says that that the outcome of gravity on a body does not rest on the nature or inner structure of that body.
A recently discovered arrangement of two white dwarf stars and a super dense pulsar, all filled within a space lesser than the Earth’s orbit around the sun, is allowing astronomers to review a variety of cosmic mysteries, counting the actual nature of gravity itself. Initially exposed by an American graduate student by means of the National Science Foundation’s Green Bank Telescope, the pulsar, which is about 4,200 light-years from Earth, rotating approximately 366 times per second, was found to be in close by orbit with a white dwarf star and the couple is in orbit with additional, more distant white dwarf.
Stairs, with UBC’s Department of Physics and Astronomy, said “By doing very high-precision …

Putting Multiverse Theory To The Test

Say our universe is a bubble. And there’s another universe in another bubble. Researchers have simulated what it would look like if the two bubbles bumped against each other, and their work could reveal the telltale signs of colliding universes -- suggesting that the multiverse theory isn’t just a wild idea, but a testable hypothesis. 
“We’re trying to find out what the testable predictions of this picture would be, and then going out and looking for them,” Matthew Johnson from the Perimeter Institute says in a news release. “We’re now able to say that some models predict something that we should be able to see, and since we don’t in fact see it, we can rule those models out.”
To put multiverse theory to the test, Johnson and colleagues imagined the simplest kind of multiple universe setup -- one in which our universe represents one of two such bubbles. Their research models what would happen if those two universes collided, and what that collision might look like to astronomers here on…

Wait, Pluto Might Be A Planet Again!

The Harvard-Smithsonian Center for Astrophysics, a few days ago, decided to once again solve the problem of "what actually is a planet?" The Harvard-Smithsonian Center for Astrophysics held a discussion between three prominent experts in planetary science, each of whom offered their case as to what a planet is or isn't.
The aim was to resolve a definition that the excited public viewers could agree on. The video of this discussion is now accessible online:

Particles and waves: The central mystery of quantum mechanics

One of the best astounding facts in physics is that everything in the cosmos, from light to electrons to atoms, acts like both a particle and a wave at the same time. But the question is how did physicists come to at this mind-boggling assumption? It has challenged us to grapple with the perplexing duality of the universe.

What Was Our Universe Like Before the Big Bang?

Theoretical physicists and cosmologists deal with the biggest questions­, like “Why are we here?” “When did the universe begin?” and “How?” Another questions that bugs them, and likely has bugged you, is “What happened before the Big Bang?” Image Credit: NASA, ESA, CXC, NRAO/AUI/NSF, STScI, and G. Ogrean (Stanford University)
Again, this is a speculation, not theory. “As of yet, these aren't established as laws of physics we understand or have checked in any way,” said Carroll. As Peter Woit, a theoretical physicist at Columbia University put it to Gizmodo, “A general piece of advice around physicists is when they say ‘we don’t understand what’s going on here,’ they really, really mean it. They’re really in the dark.”

Physicist Brian Greene lecturing on string theory (Image: NASA/Goddard/Wade Sisler)
So, now, let’s speculate. One of the strangest properties of our universe is that it has very low entropy, meaning there is relatively low disorder, or conversely a large amount of order…