THE curtain at the edge of the universe may be rippling, hinting that there’s more backstage. Data from the European Space Agency’s Planck telescope could be giving us our first glimpse of another universe, with different physics, bumping up against our own.That’s the tentative conclusion of an analysis by Ranga-Ram Chary, a researcher at Planck’s US data centre in California. Armed with Planck’s painstaking map of the cosmic microwave background (CMB) – light lingering from the hot, soupy state of the early universe – Chary revealed an eerie glow that could be due to matter from a neighbouring universe leaking into ours.This sort of collision should be possible, according to modern cosmological theories that suggest the universe we see is just one bubble among many. Such a multiverse may be a consequence of cosmic inflation, the widely accepted idea that the early universe expanded exponentially in the slimmest fraction of a second after the big bang.
The money quotes in the article come from Spergel and Silk. Claiming (possible) discovery of another universe requires rather more evidence... Good grief, I hate "science by press release."
Saying: It's unclear what, exactly, dark matter and dark energy are, means that there is something that we don't understand of the event; not that Dark energy and Dark matter exist.As someone elsewhere pointed out so called “dark matter” could be any of hundred things. It could be that "dark matter" is the effect caused by gravity from other universes leaking into ours. That could be why our universe looks perfect because it’s one amongst trillions, most of which are far from perfect.
Quote from: Star One on 07/20/2018 07:41 amSaying: It's unclear what, exactly, dark matter and dark energy are, means that there is something that we don't understand of the event; not that Dark energy and Dark matter exist.As someone elsewhere pointed out so called “dark matter” could be any of hundred things. It could be that "dark matter" is the effect caused by gravity from other universes leaking into ours. That could be why our universe looks perfect because it’s one amongst trillions, most of which are far from perfect.I cannot find your reference for that saying in the thread. Or is this simply dragging forth the usual futile claim that DM & DE does not exist, now ridiculous looking since this (barring the resolution of anomalies) was the last spike in its coffin?Besides, DM and DE are observed in many independent ways. That dark matter is anything but some weakly EM interacting matter was killed off already a few years ago by the way, or at least modified gravity ideas such as "leaking" where the initial workers (Kallosh IIRC) has abandoned it, since it is locally different everywhere. And the smart money is on DE - since it is now constant to the emptying out of cosmic background amplitude, if not the polarization data - being the vacuum energy.Notably the avoidance of Planck energies by the exclusion of chaotic inflation means that early vacuum energy dominating inflation like gravity can be trivially approximated by a quantum particle field away from "exotic physics" such as black holes (though it is arguably still somewhat exotic ), and being eternal the simplest explanation for the modern DE value becomes selection bias (aka anthropic selection). Recent papers make that problematic by lowering the marginal 5 % tail our universe was initially estimated to sit in [Weinberg] to 1-2 % [ https://arxiv.org/pdf/1710.06861.pdf ; https://arxiv.org/pdf/1801.08781.pdf ]. Though the somewhat hard to estimate but by some accepted GBR lethal activities that would make only 10 % of galaxies habitable, and Earth among the earliest habitable worlds due to sterilizing the first 9 Gyrs, could be the explanation for the narrower allowed parameter window [ http://diposit.ub.edu/dspace/bitstream/2445/106610/1/654459.pdf , https://arxiv.org/pdf/1804.10395.pdf ]. Its possible, and it would remove selection bias out of the picture by accounting for it. Personally I am not sure I like it, but if that is where the data goes ... EDIT: Language.