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post #1 of 31 (permalink) Old 01-03-2010, 06:42 AM Thread Starter
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Gravity Waves and Universe Expansion?

Has anyone ever considered the possibility that gravity waves from the Big Bang are still having an effect on us, and maybe we just happened to live during the moment where we see the distortion to be expanding?

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How Big Bang is measured:
The Big Bang theory is based on measuring that the source of light from distance galaxies are moving farther away from us. The conclusion that the universe is expanding at an exponential rate is based on same methods.

What are Gravity Waves:
Gravity is known to have an affect on light and spacetime. Gravity waves are caused when there is a change of gravitational attraction between you and the source (i.e. instead of being pulled by 1 star [our Sun], imagine being pulled by 2 stars that are orbiting each other; the gravitational attraction would chance each time they orbit each other, thus sending out gravity waves due to this constant change of gravity).

Possibilities for end of universe:
According to laws of physics, it's logical to assume that the universe will eventually stop expanding and pull itself back together (The Big Crunch). But, seeing that the universe is expanding faster and faster, scientists are acknowledging the possibility that the universe will forever expand and never be able to hold itself together (The Big Rip).

My question:
Out of curiosity, what I've been wondering about is, has anyone ever considered the possibility that gravity waves from the Big Bang are still having an effect on us, and maybe we just happened to live during the moment where we see the distortion to be expanding?

What got me thinking:
- http://www.youtube.com/watch?v=jI5JTrMP4M4# (the full episode is 44 mins long)
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post #2 of 31 (permalink) Old 01-03-2010, 09:11 AM
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Re: Gravity Waves and Universe Expansion?

For some years now, I've always known it's been still expanding, and that the universe will eventually start to come back together. However, if they find the universe is spreading out faster, than it may be that we keep going. Seems like the gravity hold is getting weaker on most of the planets, galaxies, etc. So there fore we would have less resistance and could in theory pick up speed, provided the momentum is there to support it. In that case though, i wonder what was holding us back. Other galaxies and that because we were closer? At the epicenter, was there a left over gravity mass?
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post #3 of 31 (permalink) Old 01-03-2010, 09:23 AM
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Re: Gravity Waves and Universe Expansion?

I think it would be cool if gravities force would let up just a little bit. Then we could jump father, throw things futher and run faster, + we would all weigh a little less. Then again cars would not handle as well unless we increased their weight. Hummmm!!!! :shock:


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post #4 of 31 (permalink) Old 01-03-2010, 09:35 AM
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Re: Gravity Waves and Universe Expansion?

I think it would screw things up in ways we cannot imagine.
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post #5 of 31 (permalink) Old 01-03-2010, 09:44 AM
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Re: Gravity Waves and Universe Expansion?

[quote author=agm_ultimatex link=topic=164131.msg3480217#msg3480217 date=1262529315]
I think it would screw things up in ways we cannot imagine.
[/quote]

I meant like maybe 1% less.


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post #6 of 31 (permalink) Old 01-03-2010, 10:24 AM Thread Starter
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Re: Gravity Waves and Universe Expansion?

[quote author=agm_ultimatex link=topic=164131.msg3480207#msg3480207 date=1262527918]
For some years now, I've always known it's been still expanding, and that the universe will eventually start to come back together. However, if they find the universe is spreading out faster, than it may be that we keep going. Seems like the gravity hold is getting weaker on most of the planets, galaxies, etc. So there fore we would have less resistance and could in theory pick up speed, provided the momentum is there to support it. In that case though, i wonder what was holding us back. Other galaxies and that because we were closer? At the epicenter, was there a left over gravity mass?
[/quote]

it wouldnt make sense at all to speed up tho, unless there was energy constantly propelling the masses towards their direction of travel.... the fastest these bodies can travel is the initial launch from the explosion of the Big Bang.. and since there is gravitational attraction, it would only make sense for it to slow down, IF any change of speed. this mysterious "energy" that is speeding up the expansion, scientists labeled it as "Dark Energy", only so that the expansion makes sense (its like saying u KNO there is something in the other side of the equation, but u dont kno what it is yet)

[quote author=TEKWATCH link=topic=164131.msg3480224#msg3480224 date=1262529868]
[quote author=agm_ultimatex link=topic=164131.msg3480217#msg3480217 date=1262529315]
I think it would screw things up in ways we cannot imagine.
[/quote]

I meant like maybe 1% less.
[/quote]

im sure 1% is a huge amount to physicists :P
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post #7 of 31 (permalink) Old 01-03-2010, 10:36 AM
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Re: Gravity Waves and Universe Expansion?

yes huge amount



and yes dark matter/energy is whats holding everything in place.


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post #8 of 31 (permalink) Old 01-03-2010, 03:12 PM
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Re: Gravity Waves and Universe Expansion?

Gravity does not act in terms of waves, and it does not "move" throughout the universe. This would basically prove the entire theory of relativity wrong if it worked that way. Gravity doesn't even "pull" gravity creates bends in space time which objects are effected by, we are following the bend/distortion in the fabric of space/time caused by the suns mass, just as the moon is following the bend/distortion in the fabric of space/time caused by Earth.

Also it has already been shown that the expansion of the universe is speeding up. Its not like the 'universe' will just fall apart, but what this results in is something called "heat death", which is ironic because it means our universe is cooling and eventually everything will become absolute zero. We are probably talking billions apon billions of years before this happens as the universe seems to be the ultimate recycling machine, but this is what we are headed for, total entropy.

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post #9 of 31 (permalink) Old 01-03-2010, 03:41 PM Thread Starter
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Re: Gravity Waves and Universe Expansion?

[quote author=budgy link=topic=164131.msg3480485#msg3480485 date=1262549549]
Gravity does not act in terms of waves, and it does not "move" throughout the universe. This would basically prove the entire theory of relativity wrong if it worked that way. Gravity doesn't even "pull" gravity creates bends in space time which objects are effected by, we are following the bend/distortion in the fabric of space/time caused by the suns mass, just as the moon is following the bend/distortion in the fabric of space/time caused by Earth.

[/quote]

im not talking about a single massive object pulling on other smaller objects... im talking about 2 massive objects orbiting each other.. their pull on u from each would be different because they would be different distances from u constantly

this video illustrates what i mean: http://www.youtube.com/watch?v=RzZgFKoIfQI#

i was thinking maybe gravity waves are still being thrown out from something crazy from the masses during the big bang
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post #10 of 31 (permalink) Old 01-03-2010, 04:08 PM
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Re: Gravity Waves and Universe Expansion?

ahh sorry yeah I see what you mean. just that the distortion in time and space would constantly be changing....like if all of a sudden we were to have 2 stars instead of one and rotating right around each other. of course the effects of that on our planet would be catastrophic, assuming we didn't all bake to death we would probably all be killed by giant tsunamis.

in terms of this echoing throughout the universe I think is unlikely again because we would not be 'relative' enough being all of 15 billion light years away from the proposed origin of the big bang. Although lets say the mass of the universe as a singularity, like before the big bang occurred was enough to distort space this far away I couldn't see us being affected by it now, as the universe has not expanded as quickly as the speed of light (also the same speed that gravity takes effect). You would have to imagine no more gravity originating after the big bang occured, and all the matter of our solar system also originating from that point would have to be moving the same speed as the disappearing effect of gravity in order to still be having an effect on us today, and this would be impossible as the gravity we would initially be moving with would also be slowing our advance because we would be following that distortion.

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