3 ms·
My favorite cyclic theory so far is probably Roger Penrose's conformal cyclic cosmology. In essence the universe keeps expanding exponentially which in the end
by Galaxeblaffer 3y ago
My favorite cyclic theory so far is probably Roger Penrose's conformal cyclic cosmology. In essence the universe keeps expanding exponentially which in the end becomes equivalent to a new big bang since the universe at that point will loose all notions of scale due to there being no more particles to drive scale. A much better explanation is given here https://youtu.be/FVDJJVoTx7s https://youtu.be/FVDJJVoTx7s
- denton-scratch 3y agoI'm a Penrose fan too. But I don't think CCC envisages any Big Bangs; CCC envisages a future heat death, where everything has turned into solitary photons. Photons have no clock, and don't experience the passing of time; distance is nothing to a photon, the moment it starts travelling, it arrives at its destination. So a universe containing only photons has no definite scale - it can re-imagine itself as being the size of a grapefruit, or any size you like. Penrose uses this idea to wish away the awkward and evidence-free idea of cosmic inflation.