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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?
Gravity bends to his will.
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.
Is it just me or black holes just slightly bigger than the sun sound small?
God spoke to me
LIGO is a scam and here is why. Gravity is an instantaneous or nonlocal phenomenon, otherwise orbits would be unstable and Newtonian gravity would not work. General relativists are aware of this problem and have proposed a hypothesis to explain it away. They posit that every massive body somehow broadcasts its velocity to other bodies at the speed of light. This way the receiving bodies can more or less extrapolate where the source body is even though the information is received at a later time (~8 minutes delay between earth and the sun).
The problem is that a body's velocity cannot be determined by the body because GR denies the existence of absolute motion. But this introduces another problem because a body's velocity relative to other bodies cannot be known either unless there is instantaneous communication between it and the other bodies. This, too, is forbidden by GR.
Of course, there is no way to falsify this hypothesis because the only mediating particle that can do the trick, the graviton, has never been observed. Besides, the graviton introduces an infinite self-referential regress into the works. The reason is that gravity affects everything, including the graviton itself.
More at: http://rebelscience.blogspot.com/2016/05/why-ligo-is-scam.html
ahahaha...AHAHAHAHA...ahahahaha...
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
What does this have to do with trangendered latino african american victims of gun violence stimulated by the white peoples dependence on the republican party to create a cohesive narative for their hatred of everything that is multi-cultural. It is 2016. Every story has to be put in the proper context of the disenfranchised African American. Anything that is not put in this context is racist. You my freind are a racist. I am offended that you could write such an insensitive story.
it's all mambo jambo. All they want is to be kept alive. Read get government money to play the whole day with their million dollars equipment and some PS4s
I still can't believe in this day and age, we're all supposed to be duped by such absurd guess work. The square peg does indeed fit the round hole, if you drill out the hole large enough for it to fit. So is the case with so called "science".
Let's get a fire going here! So a black hole is an infinite gobbler of space and time. To enter a black hole would take an infinity. So two black holes circling one another? There's no equation that can deal with that! Secondly, by definition, it would take in infinite amount of time for one to "collide with the other, by their own definition of the time being stretched between them.
So how they can suggest the relative sizes, and how many times they circled, as well as impact speed, - it's all powered by comic unicorns with rainbow coloured hair!
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.
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.
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?
These gravity waves were not from two black holes colliding. It was just Chuck Norris doing push-ups again.
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.
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
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
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.