3 ms·

it's not easy keeping a wormhole open, while they are correct solutions to the General Relativity equation, they are widely unstable, if memory serves. also gr

it's not easy keeping a wormhole open, while they are correct solutions to the General Relativity equation, they are widely unstable, if memory serves. also gravity is very weak and need a significant amount of mass/energy to source it, a black hole of the mass of the earth is a centimeter in diameter. and yes smaller black holes are in theory possible to make (in some theories at least) but they tend to evaporate very very quickly by hawking radiation (and none was observed at cern). then there's the ER=EPR conjecture that quantum entanglement is due to microscopic wormholes connecting the states but again doesn't seem you can shove a photon in there and get super luminal communication as quantum entanglement cannot transfer information faster than light. in the end Lorentz invariance and thus the speed of light is deeply embedded in the fabric of spacetime (we never seen any violations, and i saw the super luminal neutrino drama first hand as i was doing my phd in Bern) they are a bit like warp drives, possible in some theory, wildly impractical, certainly lethal and requires infinite energy and/or destroys the arrival galaxy. more realistically speaking, and i know ppl will hate me for this: we have a decline in biodiversity probably unprecedented since the dinosaurs went exciting, a near vertical climate trip to tackle (not making the first even worst), limited ressources to that mitigate it but more importantly: very few people paying attention. at this rate(s) i doubt the successor to the Large Hadron Collider will be ready before collapse of our civilization. i get it's nice to dream but we are tripping all regulation mechanisms on this planet and that's not something that's good for survival, fossil records show. maybe im wrong, im a physicist after all, and SuperElon FromTheFuture will ride a closed timelike curve and come Save Us All (TM) with electric rockets and SmartTechnology (C). (edit: added a pinch of dark humor.)

sidkshatriya 4y ago
Based on your interesting response I would then say: Without violating the speed of light limit, intergalactic messages are highly improbable but not impossible. The science could conceivable allow it but no practical path has been found yet. Give it 100-200 years. If civilisation does not collapse before that, we might be able to revise our answer. It took decades of experimental research before gravity wave detection become possible. Who knows what 100-200 years of research might uncover? Would you agree?
- immmmmm 4y ago
  we can't rule it out indeed, but then sending a receiver in another galaxy would require more energy than saving our civilization. it's a matter of priority i guess

sidkshatriya 4y ago

Based on your interesting response I would then say: Without violating the speed of light limit, intergalactic messages are highly improbable but not impossible. The science could conceivable allow it but no practical path has been found yet. Give it 100-200 years. If civilisation does not collapse before that, we might be able to revise our answer. It took decades of experimental research before gravity wave detection become possible. Who knows what 100-200 years of research might uncover? Would you agree?

immmmmm 4y ago
we can't rule it out indeed, but then sending a receiver in another galaxy would require more energy than saving our civilization. it's a matter of priority i guess