After the big bang, the stars and other bodies are moving away from each other. As they are moving away from each other, gravitational force by each body on others reduce due to the increase in distance. When the pulling force reduces obviously there should be acceleration. Am I wrong?
2007-09-20 07:54:05 · 6 answers · asked by Ananth Murthy 1 in Science & Mathematics ➔ Astronomy & Space
Mastermind is confusing dark energy with dark matter. Dark matter is assumed to exist in order to make observation of galaxy rotation conform with gravitational theory.
Dark energy, on the other hand, has been suggested as a possible reason for the apparent acceleration of the expansion of the known universe.
In my own Fractal Foam Model of Universes, the expansion of our universe is a result of reverse-time expansion of a sub-universe, whose cosmic foam is our ether foam. In the sub-universe, great walls of galaxies are stretched to the breaking point; like a slowly fizzing foam, the bubbles pop; this causes pressure waves to radiate thru the rest of the sub-universe's cosmic foam, which is our ether foam. Due to time reversal from one universe to the next, the bubbles of our ether foam are un-popping when pressure waves converge. Each time an ether-foam bubble un-pops, a tiny bit of new space is created, and the pressure waves disappear together with their energy. So dark energy is converted to new space.
I have not yet come up with an explanation of why the expansion of space is apparently accelerating. Actually, I haven't given that much thought, yet.
In answer to glinzek: I read the Wiki on false vacuum. It seems to be derived from BigBang theory by extrapolation ad absurdium. I strongly disbelieve all forms of BigBang. The universe is infinite.
The bubbles I refer to are the empty regions (voids) of a foam; the bubble walls are great walls of galaxies. There is a sub-universe whose cosmic foam is our ether; our cosmic foam is the ether of a super-universe.
2007-09-20 08:50:14 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Actually, that's an incorrect assumption. Acceleration can only occur when some force is supplied.
"Reducing gravitational pull" would reduce the *rate* at which things slow down - but they're still going to slow down.
Seeing them actuall *increase* in speed can only be caused by an external force.
2007-09-20 15:14:28 · answer #2 · answered by quantumclaustrophobe 7 · 0⤊ 0⤋
I see your line of reasoning and you are close, but it is the inertia of the original rapid expansion that is causing the expansion of the universe. Science suggested that the expansion should slow down because they believe that 90% of the universe's mass is Dark Matter, this matter has never been detected. Then they proposed that a force they described as Dark Energy must be causing the continuing expansion, they admit that if this exists they have no idea of where it came from. Don't you think that these scientists are just as confused as the average joe?
2007-09-20 20:04:49 · answer #3 · answered by johnandeileen2000 7 · 0⤊ 0⤋
Most of the dark energy/matter is based on a little more specifics than that. One of the main observations has to do with the rotation of galaxies. As the galaxies rotate, the outer edges should not rotate as fast as the inner parts because of the reason you listed, increased distance = decreased effect of gravity. However, it has been observed that this is not the case. The theory is this "dark matter/energy" supplies the force necessary to cause the outside of the galaxies to rotate faster than they should.
2007-09-20 15:02:24 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The bodies are moving out at some speed, but that speed would be expected to be getting smaller as gravity tries to pull them back. A rock, if thrown up, goes up slower and slower because gravity is always pulling it back. If you throw it up fast enough (faster than 25,000 miles per hour), then it will never fall back, because as it gets higher the pull of gravity gets less and less as it moves away. But it is still slowing down all the time; it never speeds up again.
But what the universe is doing is like a rock going up faster and faster instead of slower and slower. Some kind of energy has to be counteracting the pull of gravity for that to happen. We call it dark energy.
2007-09-20 16:00:12 · answer #5 · answered by campbelp2002 7 · 0⤊ 0⤋
At this point in time, dark matter is just a mathematical construct -- plugged into equations to account for the dicrepancy in the amount of observable matter and the apparent gravitational effects observed on that matter.
Phillip J -- is that theory of yours a variant on the concepts of false vacuums and bubble nucleation? It sounds oddly familiar.
2007-09-20 23:04:27 · answer #6 · answered by glinzek 6 · 0⤊ 0⤋