If gravity is a spacetime curvature(the Einstein theory which I barely understand), does all the matter in the universe itself create a large spacetime curvature that creates gravity?
If the universe IS matter, does that matter curve spacetime and create gravity?
That is, in theory, outside the Universe, if there was something else out there, would it get pulled in by gravity?
2007-03-27 09:12:56 · 6 answers · asked by Luis 6 in Science & Mathematics ➔ Physics
The universe of course contains many bodies that generate a gravitational pull on one another. However, for the universe itself to have a gravitational pull you would have to assume that there is a larger or seperate body with which to pull against. For example, if we learned that the universe was just one of many universes contained in a much larger "super universe" or perhaps another dimension, then, yes, it would make sense that the universe itself would have gravity.
2007-03-27 09:22:40 · answer #1 · answered by 180 changes 2 · 0⤊ 0⤋
(1) Yes, absolutely, the entire universe is curved because of the mass in it. It may be curved completely around on itself like a hypersphere. (We're not quite sure about this).
(2) I don't know of any theory about "something outside the universe" so I won't even speculate on that. You shouldn't labor under the misconception that the universe exists within a larger space. The universe IS all the space there is.
2007-03-27 16:21:09 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Yours is a philosophical question. What is the universe if not everything. If something is "outside" of the universe, then the idea of the universe has expanded to include that something. Einstien, Hawking, et. al., concieve of a universe that has no outside. To be outside of the universe is to not exist. So I guess the net energy, gravity, momentum and so on of the universe is zero; which is generally the assumption behind conservation laws.
2007-03-27 16:26:20 · answer #3 · answered by Tim K 2 · 0⤊ 0⤋
The universe is fill up with a black matter. If that matter is really matter that mean that it have mass which mean that it have gravity, so I think that universe do have gravity.
2007-03-27 16:51:05 · answer #4 · answered by ahil92 1 · 0⤊ 0⤋
If there are universes next to each other then they would exhibit gravity on each other. But if they were next to each other then you could go from one to the other. Therefore they would not be separate universes. Therefore I believe by definition separate universes could not exhibit gravity on each other.
2007-03-27 16:20:58 · answer #5 · answered by Jabberwock 5 · 0⤊ 0⤋
I don't know, man... that is gettin' too heavy!
that's like... way out there, man!
2007-03-27 16:20:40 · answer #6 · answered by Jack Chedeville 6 · 0⤊ 0⤋