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ReaperOfSly
Gallente
Zetsubou Corp
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Posted - 2008.12.08 22:02:00 -
[1]
But don't you know? You're already immortal. Linkage
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ReaperOfSly
Gallente
Zetsubou Corp
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Posted - 2008.12.10 23:06:00 -
[2]
 Originally by: Arianhod
Just watched a Horizon episode seen here.
It's got me wondering upon the dark energy concept. Using E=mc^2 a significant amount of the needed mass to keep the universe together would be taken account of by the fact that the universe is accelerating. But here's what I want to ask to anyone who can answer.
The previous assumption was that due to the gravity of all Galaxies acting on each other, the Universe should be slowing down. Given I have been taught the Universe expands at close to c, this indicates that we are moving relativistically in comparison to the rest of the universe.
When you jump out a plane, fall then open the parachute, it gives the illusion that you are accelerating due to the rapid deceleration. Given we are moving relativistically, could our deceleration from the gravity of the sum of the Universe be reducing the component making our perception of time speed up from what we had before? That from the origin of the universe we are slowing down but because we are so close to c, it gives the illusion of the rest of the universe speeding up?
Not really - the accelerating expansion is observed in every direction, so he Earth would have to be shrinking or something to produce that illusion. And it isn't. Remember that if you're decelerating in one direction, you're accelerating in the opposite direction. Basically, nobody knows why the universe appears to be accelerating outwards. "Dark Energy" is basically scientist-speak for "we don't know".
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ReaperOfSly
Gallente
Zetsubou Corp
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Posted - 2008.12.11 10:43:00 -
[3]
Originally by: Sokratesz
Originally by: ReaperOfSly
Basically, nobody knows why the universe appears to be accelerating outwards. "Dark Energy" is basically scientist-speak for "we don't know".
A hundred years ago it was called 'aether' 
Aether was a very specific concept though. It was the medium through which light travelled. Light is a wave, so it must be a wave IN something, right? It was the Michelson-Morley experiment that inadvertently proved that it didn't exist.
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ReaperOfSly
Gallente
Zetsubou Corp
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Posted - 2008.12.11 16:37:00 -
[4]
Originally by: Karrade Krise
Originally by: Sweety Peachbottom
Originally by: kor anon
no worries i have trouble with single sentences at times
Yeah, me too lol. Sometimes my sentences don't even
 You must tell me! Don't even what? I NEED TO KNOW! It's like a cliffhangar episode of your favorite tv series that suddenly gets cancelled!
I know what it is. It's really quite fascinating. Basically, she said
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