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Not a physicist, but as far as 2 goes, galaxies are all atoms interacting after all. Filaments themselves are emergent structures formed from the interaction of
by gnramires 6y ago
Not a physicist, but as far as 2 goes, galaxies are all atoms interacting after all. Filaments themselves are emergent structures formed from the interaction of large amounts of mass-energy at the largest scales. Forces have different ranges (scaling behavior) thus the behavior of matter changes as you change scales. At the largest scales it is mostly purely gravitational to my knowledge (plus dark energy which is also modeled gravitationally).
When you play billiards you don't expect them to gravitate toward each other! If they were on the scale of planets though, you might (it depends on how you scale their velocities). Or if you waited extremely long times, and were not under the influence of Earth's gravity you also might notice in billiards.
- centimeter 6y agoMagnetic interaction is also relevant at large scales. Strange to think that magnetism has weaker asymptotics than electricity (only being found in the form of dipoles) and yet it can form much larger structures.
- bmitc 6y ago> as far as 2 goes, galaxies are all atoms interacting after all. Although, galaxies aren't just made of things only made out of atoms. Most of the important stuff is not simply composed of atoms: black holes, stars, neutron stars, pulsars, dark matter, etc.
- KhoomeiK 6y ago> At the largest scales it is mostly purely gravitational to my knowledge (plus dark energy which is also modeled gravitationally). I think what OP might've been alluding to is the idea that phenomena like dark energy could have a more elegant explanation that is the result of emergent behavior at large scales. Just like magnetism was originally seen almost like magic, but it was later realized that it's simply an emergent property of the electric force i.e. electromagnetism.
- deanCommie 6y agoExactly, thanks for clarifying that better than I did! i wonder if there is a possible way to measure that. It does seem not crazy that if the laws of physics are completely different at nanoscopic scales, they would also be different at gigascopic ones?