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Science (non-SETI) :
LIGO detected gravitational waves at last!
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Author | Message |
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Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
http://www.ligo.org/news/detection-press-release.pdf Great discovery! EDIT: link to article: https://dcc.ligo.org/public/0122/P150914/014/LIGO-P150914%3ADetection_of_GW150914.pdf |
JaundicedEye Send message Joined: 14 Mar 12 Posts: 5375 Credit: 30,870,693 RAC: 1 |
A confirmation that Einstein had it right after all. This coupled with the recent announcement concerning the 'changeable state' of neutrons could be the first real clues as to the nature of Dark Matter and Dark Energy. "Sour Grapes make a bitter Whine." <(0)> |
betreger Send message Joined: 29 Jun 99 Posts: 11415 Credit: 29,581,041 RAC: 66 |
YES truly a great discovery! |
mr.mac52 Send message Joined: 18 Mar 03 Posts: 67 Credit: 245,882,461 RAC: 0 |
I had been starting to wonder if I would live long enough to see this day and sure enough, I have! To live long enough to see yet another validation of Einstein just makes my day! John |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
The experimental waveforms coincided almost exactly with the numerical simulations made using Einstein's field equations. This means that the equations are still valid at a great distance and not only locally. This is a very important part of this discovery. Tullio |
Gary Charpentier Send message Joined: 25 Dec 00 Posts: 31002 Credit: 53,134,872 RAC: 32 |
The experimental waveforms coincided almost exactly with the numerical simulations made using Einstein's field equations. This means that the equations are still valid at a great distance and not only locally. This is a very important part of this discovery. Yes it is. Perhaps that means that the laws of physics were fixed at T=0. Not necessarily the constants we observe today, but the laws. |
betreger Send message Joined: 29 Jun 99 Posts: 11415 Credit: 29,581,041 RAC: 66 |
Perhaps that means that the laws of physics were fixed at T=0 Interesting point |
JaundicedEye Send message Joined: 14 Mar 12 Posts: 5375 Credit: 30,870,693 RAC: 1 |
And we now have the beginning of a whole new wavelength 'window' through which to view the Universe. "Sour Grapes make a bitter Whine." <(0)> |
Julie Send message Joined: 28 Oct 09 Posts: 34060 Credit: 18,883,157 RAC: 18 |
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Michael Watson Send message Joined: 7 Feb 08 Posts: 1387 Credit: 2,098,506 RAC: 5 |
A really remarkable triumph of persistence, ingenuity and precision! It'll be interesting to see what they can do, eventually, with a network of these gravitational wave detectors, around the world, and eventually in space. With two near-simultaneous detections about 2000 miles apart, they could only say that the merging black holes were in the southern celestial hemisphere. |
SciManStev Send message Joined: 20 Jun 99 Posts: 6658 Credit: 121,090,076 RAC: 0 |
Since mass-less gravitons, at extreme energy levels also propagate at light speed, this does not leave much room for the possibility of FTL travel. Steve Warning, addicted to SETI crunching! Crunching as a member of GPU Users Group. GPUUG Website |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
A really remarkable triumph of persistence, ingenuity and precision! It'll be interesting to see what they can do, eventually, with a network of these gravitational wave detectors, around the world, and eventually in space. With two near-simultaneous detections about 2000 miles apart, they could only say that the merging black holes were in the southern celestial hemisphere. Gravitational wave detectors in space is already underway. LISA Pathfinder will test technology for gravitational-wave observatories in space. http://sci.esa.int/lisa-pathfinder/57366-esa-congratulations-on-gravitational-wave-discovery/ |
JLDun Send message Joined: 21 Apr 06 Posts: 574 Credit: 196,101 RAC: 0 |
This coupled with the recent announcement concerning the 'changeable state' of neutrons could be the first real clues as to the nature of Dark Matter and Dark Energy. Sadly I haven't kept up with this... Maybe a pointer or suggestion on we're to find out more? |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
Probably he meant neutrinos, not neutrons, which do not change state. Tullio |
betreger Send message Joined: 29 Jun 99 Posts: 11415 Credit: 29,581,041 RAC: 66 |
Gravitational wave detectors in space is already underway. Not really, AFAIK this is a proof of concept test, Lisa Pathfinder is not looking for GW. |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
If true that there were a verified collision of two black holes that were actually detected then it would be more remarkable if they could declare there is no such thing as gravitational waves. I say this because we are 100% sure that mass warps space. I always thought that any LIGO -type apparatus on Earth would not have the isolation nor the sensitivity to detect a true gravitational wave --especially from a collision a billion light years away. I would more easily believe that they all detected the Taiwan earthquake or a passing semi truck. I think also that when we get the interferometers out in space that we will detect such waves on a fairly regular basis. |
JLDun Send message Joined: 21 Apr 06 Posts: 574 Credit: 196,101 RAC: 0 |
What has (always) had me scratching my head is: How could they say 'with certainty' that the waves are from this one (or any) specific event? |
JaundicedEye Send message Joined: 14 Mar 12 Posts: 5375 Credit: 30,870,693 RAC: 1 |
Probably he meant neutrinos, not neutrons, which do not change state. Absolutely correct Tullio, I said neutrons but meant neutrinos. They seem to change 'flavor' during their life and there is theory they are a physical manifestation of Dark Energy/Matter. Here's a .pdf on the subject by the recent Nobel Physics winners....... http://www.nobelprize.org/nobel_prizes/physics/laureates/2015/mcdonald-lecture-slides.pdf "Sour Grapes make a bitter Whine." <(0)> |
JLDun Send message Joined: 21 Apr 06 Posts: 574 Credit: 196,101 RAC: 0 |
I knew about the neutrinos, and vaguely knew that 'solitary' neutrons could decay into protons (+ extra stuff); I just thought/was hoping that there was something new that I hadn't heard about. |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Gravitational wave detectors in space is already underway. Concept test? "This is tremendous news for everyone studying gravity and general relativity, and we send our warmest congratulations to colleagues in the LIGO collaboration for their outstanding result," says Paul McNamara, LISA Pathfinder project scientist at ESA. |
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