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any cosmologists?
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| Sunsnail |
| need help settling a bet, pm me and win my gratitude :( |
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| Capitalizt |
| not one professionally but I know a little..just post the question. |
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| MrJiveBoJingles |
| Isn't Omega M a physicist or something? Maybe you could PM him. |
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| astroboy |
| Just post it here. Heaps of people here know a lot about it without describing themselves as professional cosmologists.. it'd be interesting to read anyway. |
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| Sunsnail |
ok basically..dont me over i got 5 big ones riding on this.
"no object with mass can move faster than the speed of light"
thats what i said... he bet against that.
then he pulls up
http://en.wikipedia.org/wiki/Speed_...ster_than_light
and now i need some authoritative documents so i can be richer |
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| gehzumteufel |
| Ironically I remember hearing something about this recently, but I don't have any documents to prove, that at this point in time, we have no solid proof showing anything can travel faster than the speed of light. |
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| Dj Nacht |
| quote: | Originally posted by Sunsnail
ok basically..dont me over i got 5 big ones riding on this.
"no object with mass can move faster than the speed of light"
thats what i said... he bet against that.
then he pulls up
http://en.wikipedia.org/wiki/Speed_...ster_than_light
and now i need some authoritative documents so i can be richer |
Didn't really get what wiki was saying so I cant help you. Havent gotten to it yet but I suggest downloading Episode 3 Season 3 of the Universe. The description of the episode is this ; According to the laws of physics we can never travel faster than the speed of light...or can we? Learn all about light speed, the ultimate constant in the universe. |
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| Capitalizt |
You right and he is wrong. No object can move faster through light THROUGH SPACE, but space itself can (and probably is) expanding much faster than the speed of light. We have no idea what it's expanding into however and no way to measure it's true "speed" through whatever it is expanding into, because whatever lies outside our the universe is beyond our comprehension...It is entering the realm of guesswork and philosophy, not science. Everything we know and are able to measure is within our physical universe..and all matter within the physical universe is limited by the light barrier.
Objects that appear to be moving away faster than light most definitely are NOT. It is space itself that is expanding between them and us. Think of an ant walking along the surface of a deflated baloon at .01mph. If you take a huge breath and blow the baloon up completely in a fraction of a second, the distance the ant travels from it's starting position is very large. His DISTANCE has increased because the object he is traveling across has expanded in size..but the SPEED in which he is moving across the object has not changed at all. It's the exact same situation with distant galaxies. They are not moving away from us faster than light. The balloon is just getting bigger.
to summarize: yes, space itself can expand faster than light..but since space has no mass and certainly isn't an "object", he is wrong. |
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| astroboy |
As far as I understand:
According to Special relativity you're right. The issue is inertial frames - since when you speak of velocity you're referring to velocity of an object within the same inertial frame as the observer. This paper should explain how galaxies observed to be moving away from us at faster than the speed of light do not contradict special relativity: http://arxiv.org/abs/astro-ph/0310808v2 as far as I understand it because they are not in the same inertial frame as us. |
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| Krypton |
| quote: | Originally posted by astroboy
As far as I understand:
According to Special relativity you're right. The issue is inertial frames - since when you speak of velocity you're referring to velocity of an object within the same inertial frame as the observer. This paper should explain how galaxies observed to be moving away from us at faster than the speed of light do not contradict special relativity: http://arxiv.org/abs/astro-ph/0310808v2 as far as I understand it because they are not in the same inertial frame as us. |
Astroboy has it.
Sunsnail, you'r wrong. The expansion of space itself contributes to the speed of a distant galaxy traveling away from us.. |
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| Sunsnail |
| the galaxies are at rest though. im arguing that "galaxies moving away from us faster than SOL" is not the same as "objects can move faster than the SOL" |
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