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Second Gravitational Wave Detected From Ancient Black Hole Collision (theguardian.com)
An anonymous reader quotes a report from The Guardian: Physicists have detected ripples in the fabric of spacetime that were set in motion by the collision of two black holes far across the universe more than a billion years ago. The event marks only the second time that scientists have spotted gravitational waves, the tenuous stretching and squeezing of spacetime predicted by Einstein more than a century ago. The faint signal received by the twin instruments of the Laser Interferometer Gravitational Wave Observatory (LIGO) in the US revealed two black holes circling one another 27 times before finally smashing together at half the speed of light. The cataclysmic event saw the black holes, one eight times more massive than the sun, the other 14 times more massive, merge into one about 21 times heavier than the sun. In the process, energy equivalent to the mass of the sun radiated into space as gravitational waves. Writing in the journal Physical Review Letters on Wednesday, the LIGO team describes how a second rush of gravitational waves showed up in their instrument a few months after the first, at 3.38am UK time on Boxing Day morning 2015. An automatic search detected the signals and emailed the LIGO scientists within minutes to alert them. The latest signals arrived at the Livingston detector 1.1milliseconds before they hit the Hanford detector, allowing scientists on the team to roughly work out the position of the collision in the sky. In February, LIGO scientists officially announced the first-ever observation of gravity waves.
Can we please 'discover' some gravity based technologies now?
Why did it take so long to detect these? I know that there have been plenty of experiments attempting to measure them before. Are the waves smaller than expect, thus harder to detect? What was the thing preventing discovery?
"First they came for the slanderers and i said nothing."
"radiated into space as gravitational waves"
that statement was written by somebody who does not understand what he/she is talking about when using words like 'space' in this context, and probably watched some eye candy animation that used same kind of false imagery to explain this.
Trump is Chuck Norris?
captcha: demolish LOL
Is it just me or black holes just slightly bigger than the sun sound small?
God spoke to me
there are two detectors not one, one is based in Australia the other in the USA. Also many of the parts used in both sensor arrays were designed and created in Australia.
https://en.wikipedia.org/wiki/AIGO
quantum tunneling bitch. The singularities can merge due to tunneling, as the space between them shrinks, even if it would take infinite time for them to do so otherwise.
You might as well ask how fusion is possible, given that the forces inside nuclei are powerful enough to overcome the pressures inside stars. The answer, is of course, quantum tunneling.
But by all means, enjoy your ranting.
Einstein's universe seems to be vibrating like old car engine.
Every time they get closer to the design sensitivity the detector can spot signals coming from farther away, as the wave amplitude follows the inverse square law.
This increase in range will result in a great increase in the _volume_ they can observe, and remember that these detectors do not need to be pointed they way telescopes do.
The project can clearly follow the Type 1a supernova project (which brought the Nobel Prize to Saul Perlmutter) and go from detecting one signal every few months to detecting a few signals per day.
I guess I wouldn't want to observe something like that if i was only a light year away.
I just don't know who to believe. Albert Einstein and several generations of cosmologists, or a AC blowhard on Slashdot. TORN.
I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
Well if someone as obviously ignorant and stupid as you doesn't credit it, I'll give it the heave-ho. Thanks! Oh by the way, the saying is "mumbo-jumbo". We both know you'll keep mangling it, but it doesn't hurt to try to get something right for once in your god damn life, now does it?
I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
Sorry, what?
I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
[emphasis added]
If true, this was the most interesting part of your article, Louis. Got an external link to back it up?
And a blackhole takes an infinite amount of time to form. Why are you complaining about what blackholes can or cannot do if you don't believe they exist?
Quit bogarting, dammit.
Or is it 6 Euros? Certainly glad everybody is happy about this monumental discovery. Perhaps we can carry this enthusiasm on and save our little planet from it's coming inability to support life.
"Collision" might be a bit of a stretch. It implies immediacy. I didn't RTFA and I am no physicist, however I expect that the "Collision" took an extraordinary amount of time (galactic even as opposed to geologic time periods). Millions of years maybe? I have no idea. Seems if that is the case the summary is a bit sensational, in that it could more accurately be described as the waves of two black holes that slowly eventually merged into one... The end may have happened a lot quicker I suppose, but the lead time was probably enormous.
Propagandized morons bend to his will. Trump is just a symptom of the damage done by right-wing propaganda outlets like Fox and Breitbart. If you feed someone a false-narrative designed to enrage and confuse them for years, they become very vulnerable to any demagogue that comes along.
Hey dickhead, what if gravity causes cancer? You'd surely want to know all about gravity, then, wouldn't you?
Both supposed gravitational wave detections were >400 megaparsecs (1.3 billion light years) distant. That is really, really far.
For example, the CfA2 Great Wall of galaxies is only 300 million light years from Earth.
Are there really no black hole collisions happening closer to us? Are these really so rare?
Gravity is continuous, not instantaneous.It takes about 8 mins for the gravity from the sun to arrive on earth.
You seem to have bought into the A theory of time which has some unlikely implications (like no temporal differences between objects moving at high speeds and stationary objects, but this has been measured and is consistently applied in applications such as GPS).
These gravity waves were not from two black holes colliding. It was just Chuck Norris doing push-ups again.
[emphasis added]
If true, this was the most interesting part of your article, Louis. Got an external link to back it up?
It's not true. I don't have a link to back it up, but I did read it somewhere plausible written by a real physicist. The motion of the planets fits the relatavistic model. One of the problems with Newton's laws is that the motions of the planets did not fit the predictions of Newton's laws. Relativity made up for the discrepancy. The motion of the planets is conditionally stable, just like any control system in the real world (as opposed to your simulator).
I should use this sig to advertise my book ISBN-13 : 978-1501515132.
Several of your complaints are derived from the model of a black hole as an infinitely compressed point at the center of the event horizon. This is a theoretical extrapolation outside what evidence we can see. The evidence we can see sets a lower bound on the density/energy within the event horizon, but does not tell us that it is infinite. The universe is a lot simpler if you assume some maximum density that is well below infinite. This assumption is within the evidence we have and gets rid of some annoying mathematical singularities that make mathematicians twitch and result in some of the more peculiar predictions.
Regardless of whether "gravity" is "an instantaneous or nonlocal phenomenon" or not, LIGO detects the changes in gravity and the propagation of that change isn't instantaneous. I didn't understand how LIGO worked, until I wrapped my head around the fact that gravity waves are non-instantanious.
Apocalypse Cancelled, Sorry, No Ticket Refunds
By Maryland physicist Joesph Weber. He used pizeolectric strain sensors on large metal cylinders. No one could repeat his results nor prove his experiment was sensitive enough. The LIGO project is a direct reaction to this failure with a supposedly better approach. But it took over 30 years of fund raising and technology development to make LIGO work. During those 30 years Congress threatened termination several times. And skeptics like myself though there might be something incorrect with LIGO physics until they finally got a result.
If true, this was the most interesting part of your article, Louis. Got an external link to back it up?
Here's a link to an article explaining of why it's false: http://math.ucr.edu/home/baez/physics/Relativity/GR/grav_speed.html
From what I read the loss of mass in the system was converted into the gravitational waves and no gamma rays or anything were produced. If we assume this is true does it make the theory of Hawking radiation incorrect?
Forgive me if this is already covered. Couldn't find a similar post on my cell phone
It's true. Laplace calculated way back in 1805 that, in order for the moon to stay in its orbit around the earth, the speed of gravity would have to be at least 10^6 times faster than light speed. Since then, others have refined the calculations and concluded that the speed of gravity would need to be many millions of times faster than c. As I explained, this is also true in GR and relativists are aware of the problem. So they came up with a cockamamie, self-contradictory explanation to get around it. Not to mention that it makes a mockery of the principle of Ockham's razor.
But Einstein's physics is not about science. It's a political movement and a religion. Not for long though.
You don't know what the fuck you're talking about.
You don't know what the fuck you're talking about.
Oh Mr (or Mrs, or Ms) Coward. You seem to be scientifically illiterate.
I should use this sig to advertise my book ISBN-13 : 978-1501515132.
Yeah, that explains it. Not. LOL
Baez is mistaken and so is everyone else. He writes (emphasis added): "In that case, one finds that the "force" in GR is not quite central—it does not point directly towards the source of the gravitational field—and that it depends on velocity as well as position. The net result is that the effect of propagation delay is almost exactly cancelled, and general relativity very nearly reproduces the newtonian result."
First, Baez (and every other relativist) does not realize that the GR argument is self-contradictory. It assumes relative velocity and relative position. There is no way any massive body can broadcast its absolute velocity or position to other bodies because GR does not allow absolute position or motion. But this creates another problem. There is also no way a body can broadcast its relative velocity to other bodies because that would assumes instantaneous communication between them. This kills the argument right off the bat.
Second, Baez uses the analogy of a moving charged particle. he writes: "If a charged particle is moving at a constant velocity, it exerts a force that points toward its present position, not its retarded position, even though electromagnetic interactions certainly move at the speed of light."
Baez is really talking about the electrostatic force here. The only problem is that nobody has ever shown experimentally that changes in the electrostatic field move at the speed of light. The fact that Baez uses this as an example is a sure sign that,unbeknownst to him, it is indeed instantaneous. He is just assuming that somehow velocity and position information is being broadcast from the moving charge via photons moving at c but he can't prove it. The explanation fails for the same reason that I explained above. There is every reason to believe that physicists are interpreting the whole thing wrong. Only the magnetic field travels at c. The electrostatic field is instantaneous or nonlocal, just like gravity. Besides, if it weren't, the electric field around an electron would be non-symmetrical, breaking a conservation law.
There are other reasons but these will suffice.
sub:Gravitatinal Waves is like a Frog's well
Paradigm Shift- Necessity-think-tanks
Temple tanks- Hampi to Himalayas provide approach to 8-directional mode search -How Energy from space time frame get in-fusion to grow against gravity? search Human being Sensex. OM COSMIC CONSCIOUSNESS TO COSMOLOGY REVISION-2000 {Book available at LULU]
Gravity and black-hole psychology promotion misleads astronomy unable to catch-up with cosmic function of the universe -beyond Heart and center of the Universe- 100,000 Light years beyond Milky way Galactic frame. Vidyardhi cosmology studies
Sort of like how the left has been preaching that straight white males are the cancer that destroys the world? Don't think that either side is innocent of hatred. Trump is a symptom of a society being held ransom by busy-bodies that are trying to tell people how to live their lives, what they can and cannot say, and that have a singular hatred for one skin color and one gender.
How fast do gravity waves travel?
Is gravity akin to a change in the (local) pressure of time-space, which increases on approach to mass. The more the mass, the more displaced time-space is, and the higher the pressure - the greater the gravity.
Self-importance and self-indulgence is the root of ALL evil.