- #1
mrspeedybob
- 869
- 65
I was watching a documentary the other day and this idea occurred to me. Here are links to the relevant portions on youtube...
http://www.youtube.com/watch?v=4BRhjntvGoE&feature=related
http://www.youtube.com/watch?v=2zgxvGaei6o&feature=related
If gravity is not confined to 3 spatial dimensions and if there are universes parallel to ours then the gravity of matter in 1 or more parallel universes would be felt by ours but not otherwise interact. It would act like dark matter. Matter in our universe would act like dark matter in their universes. The distance between universes would allow the gravity to dissipate somewhat so that large concentrated masses like stars would not be apparent but instead the mass would look fairly homogeneous. There is no reason to believe our universe would not be average in terms of mass density and there would be no reason to believe there were only 2 parallel universes. If there were several parallel universes interacting gravitationally in this way then each would perceive dark matter to make up a large percentage of its mass.
In places where the universes were too far apart galaxies and stars would be less likely to form and there would be no intelligent life to observe the absence of dark matter. In places where the they were too close together the increased gravity would cause a localized big crunch scenario, again, no life to observe the excess dark matter. We observe the density we do because we exist in a place where the density is correct to allow for our existence.
So. My question is has this idea been explored? Has it been dismissed for some reason?
http://www.youtube.com/watch?v=4BRhjntvGoE&feature=related
http://www.youtube.com/watch?v=2zgxvGaei6o&feature=related
If gravity is not confined to 3 spatial dimensions and if there are universes parallel to ours then the gravity of matter in 1 or more parallel universes would be felt by ours but not otherwise interact. It would act like dark matter. Matter in our universe would act like dark matter in their universes. The distance between universes would allow the gravity to dissipate somewhat so that large concentrated masses like stars would not be apparent but instead the mass would look fairly homogeneous. There is no reason to believe our universe would not be average in terms of mass density and there would be no reason to believe there were only 2 parallel universes. If there were several parallel universes interacting gravitationally in this way then each would perceive dark matter to make up a large percentage of its mass.
In places where the universes were too far apart galaxies and stars would be less likely to form and there would be no intelligent life to observe the absence of dark matter. In places where the they were too close together the increased gravity would cause a localized big crunch scenario, again, no life to observe the excess dark matter. We observe the density we do because we exist in a place where the density is correct to allow for our existence.
So. My question is has this idea been explored? Has it been dismissed for some reason?