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Science has now detected gravitational wave - 2/11/2016 1:38:12 PM

DocStrange

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Einstien predicted a 100 years ago that gravitational waves existed from his Theory of General Relativity. The observatory Ligo has now detected gravitation waves. Gravitational waves are not electromagnetic waves and being able to listen for them opens up a whole new realm of astrophysics. Amazing the Einstien was able to predict this over 100 years ago with none of the tools of the modern day astrophysicists have.

http://www.cnn.com/2016/02/11/us/gravitational-waves-feat/index.html

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RE: Science has now detected gravitational wave - 2/11/2016 1:39:58 PM

mnottertail

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Ja, I saw that and thought.........of course. Its about time.

We have saran wrap, tinfoil, and duct tape, we should have the science for that, and should have had it a long time ago.

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RE: Science has now detected gravitational wave - 2/14/2016 6:07:10 PM

Cell

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Unfortunately, this means that gravitational effects proceed through space-time rather than translating instantly. I'm assuming that procession is equivalent to the speed of light since that speed appears to be a fundamental property of space-time. Perhaps a function of the minimum time it takes to transition between two 'planck length' type spacial positions... Whatever the case it seems to rule out Star Trek style warp drives actually traveling faster than light. The best they would appear to offer is traveling at or near the speed of light but perhaps being able to do so without experiencing relative time dilation.

And might I add, 'god dammit'.

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RE: Science has now detected gravitational wave - 2/15/2016 11:01:02 AM

DocStrange

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Actually no, rather the opposite. Gravitation waves is just another proof space-time can be warped. Lensing effect around black holes is another proof space-time can be warped. If we can ever develop the technology to warp space large enough, we would be able to travel faster than the speed of light.

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RE: Science has now detected gravitational wave - 2/15/2016 3:40:18 PM

outlier

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There is good story about how it was done in the NY Times.

http://www.nytimes.com/2016/02/12/science/ligo-gravitational-waves-black-holes-einstein.html?_r=0

It includes a couple of informative short videos.

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RE: Science has now detected gravitational wave - 2/15/2016 4:37:51 PM

Rule

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I do not believe in general relativity, so it is hard for me to believe in gravitational waves.

I do happen to know about a very regular gravitational effect, the source of which is quite a bit closer than two merging black holes - I do not believe in black holes - about a billion lightyears away. That source is the Moon.

As long as the detector does not register this huge, monthly gravitational effect, I am hesitant to believe that it detected genuine gravitational waves.

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RE: Science has now detected gravitational wave - 2/15/2016 7:15:43 PM

Cell

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Think about it a bit. If gravitational waves travel at a speed and the idea of a warp drive is basically to move the space containing a spacecraft through space rather than moving a spacecraft through space, then your constraint on a speed is the rate at which space can move. Any idea of how to warp it is still constrained by the speed at which it can be warped. Simply put, you are riding inside a ripple and ripples apparently travel at lightspeed. There are still ways FTL might be done but Star Trek isn't one according to this gravitational wave finding. Make sense?

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RE: Science has now detected gravitational wave - 2/15/2016 7:21:19 PM

Cell

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I wonder if they can detect the moon with their current instruments... You'd think so but then, these ripples are super tiny. It is a bit of a leap of faith in the scientists because even they don't know where the black holes were. I'm a bit sceptical too but time will tell I guess.

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RE: Science has now detected gravitational wave - 2/15/2016 9:14:18 PM

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quote:

ORIGINAL: Cell

I wonder if they can detect the moon with their current instruments... You'd think so but then, these ripples are super tiny. It is a bit of a leap of faith in the scientists because even they don't know where the black holes were. I'm a bit sceptical too but time will tell I guess.

"Anything moving and having a mass is emitting GW - current detectors are sensitive only for objects with masses equal to mass of many Suns 2x10^30 kg (2 with 30 zeros)."

Source: http://physics.stackexchange.com/questions/235248/why-is-the-detection-of-gravitational-waves-so-significant

I haven't bothered to login to any academic sites to verify that source, but I came across that site (and that quote in particular) and thought you'd find it interesting.

< Message edited by WinsomeDefiance -- 2/15/2016 9:15:39 PM >

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RE: Science has now detected gravitational wave - 2/15/2016 11:18:21 PM

Cell

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The prospects for gravitational astronomy are exciting! The abilty to 'feel' inside planets, to study dark matter, or even to determine the centre of the universe. It's such an amazing time to be alive, but I suppose people have felt the same way for various reasons throughout history. It's all relative. There were probably cave men saying 'we can make fire now! What an amazing time to be alive!'

I guess it's just discovery in general that's so great. Well I think it is anyhoo

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RE: Science has now detected gravitational wave - 2/16/2016 3:05:57 PM

DocStrange

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quote:

ORIGINAL: Rule

I do not believe in general relativity, so it is hard for me to believe in gravitational waves.

Then you do not believe in the atomic bomb? General relativity derived the E=mc2 and was the foundation for the creating the atomic bomb.

quote:

ORIGINAL: Rule
I do happen to know about a very regular gravitational effect, the source of which is quite a bit closer than two merging black holes - I do not believe in black holes - about a billion lightyears away. That source is the Moon.

As long as the detector does not register this huge, monthly gravitational effect, I am hesitant to believe that it detected genuine gravitational waves.

The effect gravity, ie: gravitation pull, is not the same thing as the warping of space-time (gravitational wave). Detecting gravitational force is not the same as detecting a gravitational wave. Detecting and measure gravitational force is easy and has been done many times over.

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RE: Science has now detected gravitational wave - 2/16/2016 8:17:16 PM

DocStrange

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quote:

ORIGINAL: outlier

There is good story about how it was done in the NY Times.

http://www.nytimes.com/2016/02/12/science/ligo-gravitational-waves-black-holes-einstein.html?_r=0

It includes a couple of informative short videos.

Excellent Link, thanks for sharing

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RE: Science has now detected gravitational wave - 2/21/2016 2:53:18 AM

MrRodgers

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quote:

ORIGINAL: DocStrange

quote:

ORIGINAL: outlier

There is good story about how it was done in the NY Times.

http://www.nytimes.com/2016/02/12/science/ligo-gravitational-waves-black-holes-einstein.html?_r=0

It includes a couple of informative short videos.

Excellent Link, thanks for sharing

Yes, now I am waiting on elisa.

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