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Originally posted by Welfhard
reply to post by spy66
The universe is expanding at an accelerating rate because of dark matter. This imbalance + general entropy couldn't have forced the expansion?
Unless dark matter is a state of perfect vacuum making everything else change ?
Originally posted by Welfhard
reply to post by spy66
Excuse me, I meant dark energy. The universe has been observed to expand at an accelerating rate. It is also theorised that the event that cased the first singularity to expand was due to an imbalance. I would speculate these two are linked.
Unless dark matter is a state of perfect vacuum making everything else change ?
The reason we know it's there is that there are apparent "voids" which are intensely heavy, warping the pathways of light in a similar way that black holes do. Then when you look at the math, for the galaxies to behave the way they do, they need to be like 90% larger. Scientists, for a long time couldn't not account for where 90% of the universe was for this reason, but it's now thought that dark matter makes it up.
[edit on 16-4-2009 by Welfhard]
Originally posted by Welfhard
reply to post by spy66
They say that it was likely stable (I'm reluctant to say "at one time" but..) then became unstable.
Entropy.
How is a convoluted question since it's hard to know anything objectively outside of these four dimensions. All I can say is that using 'God' to answer the question seems a cop out, maybe because if 'God' did make the universe, it seems (s)he abandoned it just after the first cause. There seems to be no maintenance going on here.
Originally posted by spy66
A singularity cant be stable at one point then suddenly become unstable on its own???
Originally posted by Welfhard
Originally posted by spy66
A singularity cant be stable at one point then suddenly become unstable on its own???
I never said it was on it's own. The singularity could've been a microcosm in a much much more expansive and exotic uni/multi-verse, a place where the universal rules that took effect after the big bang don't work.
We can't percieve anything beyond the BB, doesn't mean there is nothing. We can't see anything 13.5 billion light years away but it's thought that the our cosmos reaches beyond this perceived barrier.
We don't know, we are still astronomical infants, and we are now learning to crawl. Allow some time for we run.
Originally posted by spy66
I understand Got it hehe.
I never said it was on it's own. The singularity could've been a microcosm in a much much more expansive and exotic uni/multi-verse
Originally posted by Welfhard
Originally posted by spy66
I understand Got it hehe.
I just think that there is a lot that we don't know, or even see, or could possibly even comprehend, it tends to happen in cosmology, just ask the people who though that earth was the centre of the universe and the solar system was the universe.
Originally posted by Jim Scott
I was so impressed with the new thread on the size of the universe,
www.abovetopsecret.com...
that a very important thought came to me. The Hubble telescope photo shows stars and galaxies at 13 billion light years away, right? These galaxies have trillions of stars, and the universe is dated to be only 800 million years old in that photo, right? Now, I'm going to ask you a very obvious question: How did the material from all of these galaxies disperse throughout the 13 billion light years of distance in only 800 million years? It is, according to the Theory of Relativity, impossible. All the matter in the universe had to move such great distances, that to cover those distances and be dispersed in only 800 million years means they would have to be traveling at speeds much faster than the speed of light.
The minimum distance to travel would be 13 billion light years in 800 million years, correct? To reach these distances at the speed of light would have taken a minimum of 13 billion light years. If these galaxies dispersed in 800 million years, that means they traveled at (13 billion light years divided by 800 million light years) times the speed of light. The number is 16.5. So, the universe dispersed at 16.5 times the speed of light, then it suddenly slowed to below the speed of light, coalesced, formed living organisms etc. If you take out the last 4.5 billion years when we assume the Earth was in place and beginning to show signs of life, that means the universe would have to be dispersed in only 8.5 billion years. That makes the speed not 16.5 times the speed of light, but now makes it 25.23 times the speed of light. Whew! That is some serious moving... and then it really had to stop fast.... If you really think about it, just the stars and galaxies in the Hubble photo are over 800 million light years apart. That's impossible, right? Because you can't move matter faster than the speed of light.
Originally posted by Welfhard
I'd like to add that in our micro universe, atoms can break down if they are too large and are unstable - perhaps the same principle occurred when the singularity broke down. 99.9999 percent of the atom is empty space. Compare that with the cosmos which is 90% empty space.... Makes you wonder (think about the end of the MIB movie).
[edit on 16-4-2009 by Welfhard]
But if a atom is unstable it is because of pressure differential.
If a atom is to grow in mass it would have to be isolated and Fed more mass. And it would never grow unstable in a isolated environment. That is impossible.
Originally posted by Welfhard
But if a atom is unstable it is because of pressure differential.
If a atom is to grow in mass it would have to be isolated and Fed more mass. And it would never grow unstable in a isolated environment. That is impossible.
No, actually it's called radioactivity. Alpha and beta radiation is due to radioactive isotopes breaking into smaller and more stable particles.
It's like building a tower out of brick. Too big and it'll start to break apart.
[edit on 16-4-2009 by Welfhard]
Originally posted by Welfhard
reply to post by spy66
And yet it's the heavier atoms that will decay. Neutrally charged atoms of plutonium and uranium will eventually decay at a consistent rate. Some Atoms are so unstable that the don't occur in nature and will occur in the lab for microseconds before decaying.
Originally posted by Welfhard
Pressure doesn't equal mass. The mass of an atom doesn't change with pressure - nothing does. The mass of an atom is base on the number of protons and neutrons in the nucleus. Pressure doesn't change the amount of sub-atomic particles in the nucleus. An atom above a certain mass break down because the structural integrity becomes poor, so it falls apart into far more stable atoms/isotopes.
Radioactivity
List of elements by stability of isotopes
If an isotope is unstable, it is more reactive - simple entropy - but there are elements that have no stable isotopes and their nucleus may break into two smaller nuclei typically a slightly smaller nucleus and a hydrogen atom/ion (alpha radiation).
[edit on 16-4-2009 by Welfhard]