3 ms·
> And dark matter is just matter from other universes. This is a fun idea. You can illustrate it by drawing your classic 2D universe on a piece of paper, sprin
by halgir 3y ago
> And dark matter is just matter from other universes.
This is a fun idea. You can illustrate it by drawing your classic 2D universe on a piece of paper, sprinkle metal dust around, and move it with magnets held above or below the paper. To the 2D creature, matter in their universe seems to be affected by forces from entirely invisible objects, but 3D creatures can observe exactly what's happening. Likewise our "dark matter" would simply be matter on different planes in the same >3D universe as us. We neither see it nor collide with it, but we observe its gravitational pull.
- uh_uh 3y agoThat matter from the other universes seem to pretty well line up with galaxies in our own universe which makes this theory a bit sus. I'd expect at least some of them to be scattered at random places, whose gravitational lensing effect we should be able to observe.
- halgir 3y agoThe matter is not in a different universe, but in our universe. Just a different spatial plane of it. Much like a 3D structure intersected by the plane of a 2D universe is surrounded "by itself" in the third spatial dimension. In such a case, the extradimensional matter lines up quite well with the observable. Mind you, I'm not a physicist, and I'm not (necessarily) proposing this as a serious model. Just an internet commenter riffing on a fun idea.