5 ms·
Intriguing; Is this actually serious? Like, is it possible that the unaccounted for matter (what, ~98%) is simply locked within dyson galaxies?
by bollu 6y ago
Intriguing; Is this actually serious? Like, is it possible that the unaccounted for matter (what, ~98%) is simply locked within dyson galaxies?
- avian 6y agoNo. Because of thermodynamics they would necessarily emit some thermal radiation and we’re not seeing it.
- fabiospampinato 6y agoCould it be, hypothetically, that there are so many layers in the swarm that the radiation that will get eventually be emitted is outside of what we can detect?
- gbrown 6y agoNo, given that we can map the dark matter density in galaxies - having a bunch of dark matter galaxies wouldn't explain the shapes of what we actually observe.
- marcosdumay 6y agoThere are current telescopes that detect everything down to the universe thermal radiation, and a bit bellow. There's no place to hide there.
- CamperBob2 6y agoThermodynamics doesn't require isotropic radiation. If you're going to shed a lot of waste heat, why not aim it out of the galactic plane, so as to avoid calling unnecessary attention to yourself?
- saberdancer 6y agoNo. One of the issues with current understanding of galaxies is that our understanding of gravity does not fit the rotation of the galaxies we are observing. To explain this, and other effects, we use dark matter. There was a theory that the reason for the discrepancy is that our understanding of gravity is wrong, and that it is in fact a calculation error on galactic scales. The problem with this is that apparently there are galaxies which seem to have very little dark matter and are much closer to expected behavior than other galaxies. So we are left with the dark matter explanation so far.