can we deduce that the universe rotates as well, and that at the center of the universe is the mother of all black holes rotating in the opposite direction of the universe?
2007-12-24 08:14:43 · 9 answers · asked by theypissonourbacksandsayitsrain 1 in Science & Mathematics ➔ Astronomy & Space
sure, but I wouldn't say that the center is a black hole.
mass was expelled from the center, not collected.
2007-12-24 08:55:30 · answer #1 · answered by Mercury 2010 7 · 1⤊ 0⤋
Well, the universe is not exactly a sphere. Geometrically, since it is basically flat, it can not be a sphere, not even a hypersphere. There are other higher dimensional manifolds which are flat and have the required properties. Think about ANY shape you can make of a flat sheet of paper without scissors or by having to fold it.
The universe does not have a center, or, more precisely, the center is EVERYWHERE at once. So that rules out some central mass. If it had a gravitating center, we would see it interact with matter falling in, anyway... so that one does not fly for a number of reasons.
The "rotation" question is a difficult problem. Angular momentum is conserved like energy, mass and charge. We know that there is net energy in the universe and net mass. We do not know if it is charged, or not, and while we do have good upper bounds on its angular momentum, the ultimate question if it has to be exactly zero or not has not been answered to everyone's satisfaction (that includes me). And might not be for a long time.
2007-12-24 08:53:40 · answer #2 · answered by Anonymous · 2⤊ 0⤋
If the universe is spatially infinite and if there is nothing outside of it, then we cannot think of a test that we could do to determine if it rotates. We don't even know how one would define "rotation" for such a universe.
If the universe is only a part of a larger "multi-verse", either much bigger in extent or having more spatial dimensions than the 3 we are familiar with, then maybe "rotation" could mean something; once we understand what that something is, then we could imagine a test to determine if our universe rotates.
Interesting ideas have come from such a thought. For example, if the universe is rotating rapidly (in our common understanding of "rotation") then the observed expansion could be due to centrifugal force instead of a difficult-to-imagine dark energy; the apparent acceleration in the observed expansion could be due to an accelerating rotation.
However, other things are needed before we can turn this idea into a scientific hypothesis and, much later in the process, into a full-fledged theory that can be tested.
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Black holes are totally irrelevant in this idea. They are simply a form of mass.
2007-12-24 10:00:15 · answer #3 · answered by Raymond 7 · 0⤊ 0⤋
According to big bang theorists the universe is a 4-dimensional sphere, with space as its surface. All the stars and galaxies are on the "surface" (the surface being 3-dimensional makes it hard to imagine it as a surface), and nothing is in the center. Einstein's theory of relativity, which proposes 4-dimensional spacetime, makes this possible. The 4th dimension, time, not only forms a sphere out of space, but creates dimples on its surface around matter because of gravity.
2007-12-24 08:20:47 · answer #4 · answered by Anonymous · 1⤊ 1⤋
Hi,
The thing is that we can´t be sure the universe is spherical. It could well be alongated. The distibution of observed galaxies is irregular and seems to be part of a bigger structure.
Also the known universe is said to be expanding in all directions. Others theorize that there are multiple universes side by side like soap bubbles.
Maybe the universe is speck of dust in a bigger universe?
Happy Holidays.
2007-12-24 08:59:28 · answer #5 · answered by Gone With The Wind 7 · 0⤊ 0⤋
the universe could be spinning, but there is no black hole at the center. if there was the galaxies would rotate around it, and they arent. they are just moving throughout space away from eachother.
if the universe spun we would never know. we are confined to the universe. its like being an ant on a basketball. the ant can only tell that the ball is spinning by observing the world outside of the basketball. we arent that fortunate since everything we do and see is confined to this universe and its space.
2007-12-24 08:29:38 · answer #6 · answered by Anonymous · 1⤊ 2⤋
an interesting trheory, and you can deduce that if you like. the best part about the universe is that no one really knows for sure. you're free to believe whatever you feel is the best answer.
2007-12-24 08:20:03 · answer #7 · answered by j lama 1 · 0⤊ 2⤋
Whether the universe is really expanding is still not decided: http://www.a2dvoices.com/realityCheck/doppler/
2007-12-26 22:46:21 · answer #8 · answered by M D 4 · 0⤊ 0⤋
Could be. Like a bathtub drain.
2007-12-24 08:19:12 · answer #9 · answered by shaken & stirred 3 · 0⤊ 1⤋