pavelcherepan Posted February 12, 2016 Posted February 12, 2016 Wow! It's a sad day for all crackpots out there! 2
Mike Smith Cosmos Posted February 12, 2016 Posted February 12, 2016 (edited) Here are three more shots from the worldwide news over the last 24 hours . Kip Thorn . Project Co- Founder Graph of Strain / time Illustration of circling black holes Mike Edited February 12, 2016 by Mike Smith Cosmos 1
DrmDoc Posted February 12, 2016 Author Posted February 12, 2016 As a novice, I'm in awe of the implications that we may be experiencing continual micro-distortions in earth space-time. Although the implications for astrophysics are astronomical, I find myself looking for some small clue that I could be experiencing micro compressions and dilations of time--I know, it silly but....
hoola Posted February 12, 2016 Posted February 12, 2016 (edited) nice to hear this, and hopefully soon we will learn how to generate/receive low level G waves and use them as a replacement for traditional EMF and get rid of those damn ugly cell towers... Edited February 12, 2016 by hoola
dimreepr Posted February 12, 2016 Posted February 12, 2016 That's not going to happen... https://www.facebook.com/AlbertEinstein/videos/10153660858099843/
DrmDoc Posted February 12, 2016 Author Posted February 12, 2016 That's not going to happen... https://www.facebook.com/AlbertEinstein/videos/10153660858099843/ Your right, but when I think about it, I've been experiencing time distortion my entire life: Compression mostly during my youth, dilation now in my waning years.
Mike Smith Cosmos Posted February 12, 2016 Posted February 12, 2016 (edited) That's not going to happen... https://www.facebook.com/AlbertEinstein/videos/10153660858099843/ Included in this sequence of videos is :- The university of Chicago video . It is a very interesting short video to watch , as they processed the data to come up with the identification . The direct link to this video is given below , Link :- https://www.uchicago.edu/features/scientists_find_ripples_in_fabric_of_spacetime/ If these waves are NOT electromagnetic waves , do they propagate at a different speed ? Or is propagation in space a constant , namely same for EM ( electro magnetic ) , same for gravitational waves ? As I thought the propagation speed came out of Maxwells equations which were/ are electro magnetic ? Mike Edited February 12, 2016 by Mike Smith Cosmos
Mordred Posted February 13, 2016 Posted February 13, 2016 Speed limit of all interactions is c. Gravity propogates at c in a vacuum same as the electromagnetic. 1
Robittybob1 Posted February 13, 2016 Posted February 13, 2016 (edited) Speed limit of all interactions is c. Gravity propogates at c in a vacuum same as the electromagnetic. has this been proven? If they could see the two black holes combining at the same time as the gravity waves being detected that would be a wonderful proof of that. Edited February 13, 2016 by Robittybob1
Mordred Posted February 13, 2016 Posted February 13, 2016 https://en.m.wikipedia.org/wiki/Speed_of_gravity Here is one test. http://www.nrao.edu/pr/2003/gravity/ http://www.nbcnews.com/id/3077353/ns/technology_and_science-science/t/first-test-gravitys-speed-upholds-einstein/ 1
Mordred Posted February 13, 2016 Posted February 13, 2016 (edited) I would recommend a separate thread for that discussion. Lets not detail this one but if you think about it measuring the gravity waves from those two BH mergers shows that gravity isn't infinite in speed. They can use these results as another test of the speed limit of gravity The fact that the design of the LIGO detector requires measuring a difference in the gravitational field ... and succeeded in doing so tells us gravity doesn't infinitely propagate. PS another source of data on speed of gravity. Edited February 13, 2016 by Mordred
surreptitious57 Posted February 13, 2016 Posted February 13, 2016 Saw two figures for the speed the black holes were rotating at before merging One was fifty per cent light speed and the other was sixty per cent light speed
Robittybob1 Posted February 13, 2016 Posted February 13, 2016 Saw two figures for the speed the black holes were rotating at before merging One was fifty per cent light speed and the other was sixty per cent light speed So were they virtually no distance apart (merged=singularities touched) or was that when their event horizons touched. What is "merged" in physical terms? for when one of the singularities go beyond the other's event horizon I suppose the concept of information going out is stopped. Did the gravitational wave terminate abruptly as that would suggest for the two singularities could take forever to fully merge (doesn't time stop at the EH?)
imatfaal Posted February 13, 2016 Posted February 13, 2016 ! Moderator Note This is a Science News Post with information regarding a very important experiment and an interesting result. It will not be tolerated for members to use it as a launch-pad for hijacks. Rob - you have been a member for long enough to realise that your hijack is completely against the rules; not only is it in the wrong forum, it is an argument from incredulity, and flies in the face of the physics which is accepted by the scientific mainstream and which is constantly re-enforced by the daily utility and accuracy of things such as GPS. I have split your hijack off to Speculations - but unless there is some meat on the bones of the argument from lack of understanding very soon it will be locked.
Strange Posted February 13, 2016 Posted February 13, 2016 (edited) So were they virtually no distance apart (merged=singularities touched) or was that when their event horizons touched. It is the process of the event horizons combining into one, larger one. From my understanding the merger is inevitable before the event horizons actually touch. If you look at some of the simulations, there is a point where the event horizons start to stretch towards each other. At this point the merger is inevitable. Did the gravitational wave terminate abruptly as that would suggest for the two singularities could take forever to fully merge There are several statges (which can be seen quite clearly in the graphs). There is the "inspiral" as the two black holes orbit each other faster and faster, and closer and closer. This happens because so much energy is radiated away as gravitational waves. After the actual merger there is the "ringdown" phase as the resulting event horizon settles back down to a sphere. All these have been simulated in detail for many different conditions, which is how they were able to identify so precisely what this even was and how far away it was. (doesn't time stop at the EH?) This is a popular science myth oversimplification. Edited February 13, 2016 by Strange
ajb Posted February 13, 2016 Posted February 13, 2016 Maybe off topic... but Prof. Andrzej Królak who is based in the Institute of Mathematics of the Polish Academy of Sciences (where I am also based) is one of the co-authors of paper in Phys. Rev. Lett.
StringJunky Posted February 13, 2016 Posted February 13, 2016 Maybe off topic... but Prof. Andrzej Królak who is based in the Institute of Mathematics of the Polish Academy of Sciences (where I am also based) is one of the co-authors of paper in Phys. Rev. Lett. Nice. What was his part in the project? I quickly read up on him that he's a GR maths specialist.
ajb Posted February 13, 2016 Posted February 13, 2016 Nice. What was his part in the project? I quickly read up on him that he's a GR maths specialist. I will ask him when I see him again. I know he is the leader of a Polish group within the Virgo project and that they work closely with the LIGO project.
StringJunky Posted February 13, 2016 Posted February 13, 2016 I will ask him when I see him again. I know he is the leader of a Polish group within the Virgo project and that they work closely with the LIGO project. OK.
Robittybob1 Posted February 13, 2016 Posted February 13, 2016 It is the process of the event horizons combining into one, larger one. From my understanding the merger is inevitable before the event horizons actually touch. If you look at some of the simulations, there is a point where the event horizons start to stretch towards each other. At this point the merger is inevitable. There are several stages (which can be seen quite clearly in the graphs). There is the "inspiral" as the two black holes orbit each other faster and faster, and closer and closer. This happens because so much energy is radiated away as gravitational waves. After the actual merger there is the "ringdown" phase as the resulting event horizon settles back down to a sphere. All these have been simulated in detail for many different conditions, which is how they were able to identify so precisely what this even was and how far away it was. This is a popular science myth oversimplification. Thanks for that Strange.
curiousone Posted February 15, 2016 Posted February 15, 2016 About this gravitational wave? Is it possible to outfit a special space ship to use the waves as a energy or a engine to propel the ship to another planet? The waves push and pull the ship to it's destination and the waves can be engineered as a energy to use as a engine? curious one
Strange Posted February 15, 2016 Posted February 15, 2016 About this gravitational wave? Is it possible to outfit a special space ship to use the waves as a energy or a engine to propel the ship to another planet? The waves push and pull the ship to it's destination and the waves can be engineered as a energy to use as a engine? curious one As the waves are barely detectable (changing the length of a 4km instrument by less than the width of a proton) I don't think there is anyway of extracting useful amounts of energy.
MigL Posted February 16, 2016 Posted February 16, 2016 Maybe if you were extremely close to the event... But the energy density needed to physically move your ship large distances ( I imagine you mean like surfing a wave, if even possible ) would lead to serious repercussions. Gravity and its associated effects, can't be shielded.
DimaMazin Posted February 16, 2016 Posted February 16, 2016 . There is the "inspiral" as the two black holes orbit each other faster and faster, and closer and closer. This happens because so much energy is radiated away as gravitational waves. If they turn only gravitational mass into gravitational waves then they must be farther and farther. Do they lose kinetic energy for gravitational waves emission?
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