LISA Gravitational Wave Observatory

[ehswan]

What if gravity propagates at infinite velocity?  How then would we measure the duration of such a wave? Get it? Infinite velocity = infinitesimal time span!

[canisslav]

no information can travel at a speed greater than the speed of light.

[tuseroni]

ok people stop saying this is the voice of stephen hawkings, just because it is a computer generated voice doesnt mean its stephen hawkings, his computer's voice doesnt sound anything like that.

[Cult1022]

..and i think they'll need 4 points (spacecraft) to get a better 3D (seems that we need 4D here) understanding.

[Aasmaema]

its three due to triangulation, as in trigonometry, it has nothing to do with the levels of dimensions

[Cult1022]

interesting - but poor voice :)

[BokitoBanana]

I wont torture myself whit this fucked up computer voice, your video sucks

[anomoly76]

I remember a black project scientist claiming he worked on vehicles that warp the distance/time and thats how the craft traveled in very high speeds. I think the new concept he introduce was there are gravity waves at the macro and micro level. So the theory is if you could access the atomic gravity wave (micro) and amplify it to a larger wave, you can see the affects of time/distance changing. Hopefully the LHC might bring us a step closer to show evidence of gravity in the micro realm.

[Fujimoto420]

Ok all you idiots making WTF comments about the voice need to STFU. It's obvious that it's computer generated and it is most likely the voice of world-renowned theoretical physicist Stephen Hawking. If you knew anything about him, you'd know that he is confined to a wheelchair and cannot speak because of neuromuscular dystrophy. In simple terms, HE'S PARALYZED. He CAN'T talk or "fix his voice" so ease off the voice comments. Have some respect for the guy.

[artisticshit]

T-pain's voice

[stimsWonderland]

looked like a tricked out lava lamp kind of thing

[subash3]

this voice is computerised. if you type a comment below and click on ''audio preview'' u can here the similar voice.

[futurearmysniper94]

wtf is wrong with your voice

[CaptainZ1627]

ok, like, the voice made me not watch it

[soundoflight]

Thats the coolest things.

[seopeter22]

wth, is the sound edited?

[martinol]

it might be a computer voice

[discountzone]

fix your voice wtf

[TheReasonWhyGuy]

the voice if horrible...

[zloben9000]

does creating gravity waves consume energy in terms of spacetime friction or not ???

[ssnatcherss]

what an ambitious experiment. sounds extremely tricky with all the high accuracies required to detect a gravitational wave.

[r06u3AP]

Just one problem - the spacetime interval is frame invariant. Which means that you can't use a local speed of light measurement in an inertial frame to detect changes in interferometer arm length (or, equivalently, changes in light speed). That would mean that the laws of physics change according to gravitational intensity which would violate Relativity.

[Stagewerx]

Perhaps not light per se but, sonoluminescence. Sound is whole and using light to view the procreation of light could be a matter to measure.

[RodneyKawecki]

Please read my video on gravity waves. Gravity waves may be so condense that there detection may well be almost impossible. Even aat the horizon of a black hole the suction of gravitational waves will not be detectable. The resaon is based on the theory that gravity is constant. Thereby undetectable.

[crazydammonkey]

the universe cannot be expanding becuase supermassive blackholes would devour other supermassive blackholes via making the universe smaller

[Arianive]

I understand gravity waves caused by spinning supermassive objects. But what about gravity itself? Is there any belief it has a wave propagation mechanic (like light, but even faster) or is it still assumed to be infinite and instant? Will this experiment help to make that determination?

[amanualgearbox]

im no expert

but do you mean LIGO instead of LISA?!?!?!

[timberman78]

LISA = Laser Interferometer Space Antenna...

[drumbum99]

there are two =D

so they can cancel out any like disturbances from earth

[urbanverificationist]

I think of a gravitational field as an interference/interfacing pattern in an otherwise expanding universe. i.e. the quantum field of space interfacing with the quantum energy of matter thus interfering locally with the formers general expansion.

[proconsulaugustus]

Very ANNOYING to hear this imperfect artificial voice! The subject is fascinating but this 'guy' sounds like he's about to burp all the time. For gods sake just belch and continue. stupid choice on part of video producer. Great info though.

[AmyK007]

Great thank you. Any chance of a real voice? I'm sure yours is lovely.

[BrunoTheQuestionable]

I haven't overcome my mic shyness yet, but thanks for the vote of confidence. I love your accent btw :)

[AmyK007]

Thats kind of you thank you. Just give it a go and don't worry what other people think. Just make sure that you are clear and precise and read from a script if you like. You posted such a good video, with a great voice, you'll get science enthusiasts like me subscribing in no time. My best wishes to you my friend.

[BrunoTheQuestionable]

Thanks for the good advice - I might try it sometime.

[RoadRunnerLaser]

Bruno, that text-to-speech is quite irritating to listen to. It really detracts (and distracts) from the content. Would you like me to re-record the narration for you ?

[untungsky]

well if ever we found out that grv. waves , we may be able to defy it. if we can control or manipulate grav. wave .Maybe we can develope a gravity defying inter stellar spacecraft in the future, fucking weird..

[ronmichaeli]

All Scientists are nothing like God because he made this stuff up. He is Gravity, he is the world. all they can say is how things work but not WHY?

[untungsky]

ohh fuck that funny voice. so? if you guys found and calculate gravity wave whats the benifits? so what is that for? leave that damn gravity alone.!!!

[nitrex]

Actually calculating gravity and learning about it more can tell us what our universe is really made up of and from where it came from. Gravity is suppose to be a strange phenomena which we cannot observe or touch but its what brings our planets and us around the motion.

[untungsky]

aahh.. universal law of gravition, father of gravity i. newton. gravitons, atomic level. you know why? gravitons are close loop string. if they found and calculate or control gravity waves. we maybe able to communicate to another dimension string theory suggest. The univese started at a single point, after the big bang it expanded to 15 billion light years across and still going. but it will stop expanding and reverse to a single point again. Why? Gravity.!!!

[nitrex]

well maybe not but their is a special case for it. Scientists believe in gravitons but yet their was no way of seeing them just yet, a new Hadron collider is being built with a lot of power and energy to see wither gravitons exist or not.

[nitrex]

It is not just gravity which affects our Universe, its also Dark energy and Dark matter, theory states that Dark energy keeps our galaxy spinning and moving away, it also shows that we are not seperated from each other.

[schitzen]

If you're gonna make a text-to-speech synthesizer, why would you garble it up with a friggin' british accent?

[BrunoTheQuestionable]

Maybe its because I'm British !

[schitzen]

I researched modern text-to-speech and discovered that it's not really synthesized like back in the 90's, but are algorithmically selected sound bites of recorded real speech. Could you do it again with a mexican-spanish accent, and intersperse it with random "vato"s and "holmes"es?

When that happens, I'm officially going to assume every announcement over a PA is fake.

[BrunoTheQuestionable]

lol - unfortunately I don't have any of the spanish voices.

I think you're correct about the algorithm.

[mephis]

Why did they chose equilateral triangular formation? Isn't a formation like an octahedron better at detecting where the waves are coming from? Sorry if that sounded stupid.

[BrunoTheQuestionable]

I guess they want to minimise the complexity and number of probes.

A tetrahedron would cover the whole sky with full resolution - maybe thats for the next generation.

[helloPDE]

do gravitational waves cancel each other? and if they cancel at a place does that mean theres no gravity there/ you cant feel a gravitational force?

[BrunoTheQuestionable]

GWs sum together just like light waves do, so in principle a wave and an inverse wave could be set up to cancel. The gravitational force is caused by the slope of the time-space field. To cancel it you would need to add an inverse slope from an equal mass on the opposite side of the observer. I can't see how to make an anti-gravity machine :)

[JaalaJ]

I say things and people are weird all the time. Most of the time it means good!

[BrunoTheQuestionable]

For me weird is interesting.

But when I say something is weird, I mean it makes no sense.

I like the good usage.

[turttle0]

um im 15 i dont know what you mean sorry but i ment the vid is weird in a good way as in cool

[BrunoTheQuestionable]

We're suffering from a generation gap here.

It was a quote from the original Star Trek series, where an intelligent probe called Nomad threatened to destroy the Enterprise.

I didn't know weird could mean cool, so thanks for that :)

[legrange]

generation gap. funny!

[BrunoTheQuestionable]

To answer the original question, the voice-over was generated by a "text to speech" program, which reads a text file and uses speech synthesis to create the audio track.

[legrange]

Video is good.

[turttle0]

is that a computer talking and this vid is weird

[BrunoTheQuestionable]

Non-sequitor.

Your facts are uncoordinated.

Sterilize the imperfections.