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Everything about the universe as we see it would be a mystery to them, because the only way of them interacting with our universe is through gravity. But if you
by Udo 11y ago
Everything about the universe as we see it would be a mystery to them, because the only way of them interacting with our universe is through gravity. But if you see it from our side, to us dark matter is just an incomprehensible field of gravity with no known source as well. So their perception could be absolutely identical to ours.
This opens up a wild but entertaining hypothesis. Assume we have two universes, one of which is ours, and both are located very "close" to one another (whatever that means, maybe it's the next Brane over or something). Our dark matter could just be gravitation leaking out from that other universe. It would certainly explain why there is no other interaction. It would also explain why gravity is such a weak force (because it's leaking out). And our gravitational hotspots would in turn have the same effect on their matter.
- SolarNet 11y agoIt would also explain the amounts of normal matter and dark matter (4.9% normal, 26.8% dark), there could be a couple of universes that are close to a given universe (like ours). I'd be curious what sort of geometric configurations (along with equations) would lead to ~5.47 universes worth of gravity to leak through to each universe.
- gizmo686 11y agoAssuming the leaking hypothesis, the exact amount that is leaking into our universe wouldn't have any particularly meaningfull reason, in the same way that we now understand that their is no particular reason behind the distance between the Earth and the Sun.
- pavel_lishin 11y agoBut can't we infer a lot about the formation of the Solar System from the masses of the planets and their current orbits? One could argue that the particular reason we're here is because Jupiter swept the Solar System of most of its dangerous asteroids.