Image collected whilst scouring the CMBR (Source)
Some of you may recall a popular article we posted several months ago, dealing with voids and super-void. These celestial regions (which are devoid of stars, galaxies, planets, clusters, and other forms of matter) were initially discovered while physicists were busy mapping the cosmic microwave background radiation (CMB). This radiation is a relic from the big bang; it originated during the opening chapter of our universe, when the cosmos was a mere 380, 000 years in age. This background radiation should be evenly dispersed throughout the universe. Instead, physicists noted a huge cold spot stretching across an expanse of space almost one billion light-years in diameter. This cold spot is located in the constellation of Eridanus, and the discovery baffled astronomers.
Credit: Scientific American (Source)
Since then, many theories have surfaced in an attempt to explain the discrepancy; some of these theories argue that this area might be occupied by auniverse-in-mass black hole or perhaps, it is a leftover souvenirfrom a change in the texture of spacetime. There is also the super-void hypothesis, and some have even suggested that the void is evidence of a parallel (or a sister) universe -meaning that both our universe and our sister-verse belong to a larger multiverse.
The last controversial idea one than many physicists want to believe in was cooked up by Laura Mersini-Houghton, who subsequently made five predictions about the nature of this cold spot in hopes of vindicating the existence of a multiverse. The idea proposed was essentially a landscape multiverse idea. This is something that is believed to be inherently tied to the multiple dimensions of string theory, which gives us an idea of the principles that must be met in order for life to develop in any given universe. In this scenario, our universe is but one in a massively huge number of universes perhaps its just one in an INFINITE number of infinitely large universeshurts your head, doesnt it? (it does mine too)
Out of the five predictions made in Mersini-Houghtons paper, entitled Cosmological Avatars of the Landscape I: Bracketing the SUSY Breaking Scale, 4 have been verified, or at least they havent been ruled out. Here they are as follows:
Lets say our universe is a part of a larger number of multiple universes, our universe most likely formed through a bubble in another universe, created through quantum fluctuations within the vacuum energy (maybe an infinite number of them formed this way too), spawning a universe equipped with its own laws of physics, energy levels, matter concentrations, arrow of time, and entropy level. Some of these said bubbles could collapse in on themselves before undergoing something similar to inflation, with only a certain number of them progressing beyond that point, depending on the characteristics the baby bubble developed early on.
After the bubble stabilizes, it would effectively be cut off from the universe it was born into, losing all of the information from it. However; it could hypothetically interact gravitationally with other universe, which is exactly what Houghton thinks happened in the cold spot in the CMBR an area of space seemingly containing an imprint of another universe apart from our own. Its even possible that in theory, another bubble is developing in our universe.
Though I remain highly skeptical (and so should you. Extraordinary claims require extraordinary evidence, after all) This could very well help explain why our universe appears to be fine-tuned for life from our perspective. After all, if an infinite number of universes exist, an infinite number of them would have each and every characteristic our universe has, with an infinite number of them that are radically different than ours. Can you imagine living in a universe where the arrow of time runs backward, with gravity acting as a repellent force? (basically, a universe where dark energy is the the norm)
Whilst living in a multiverse, its conceivable that such a universe can and does exist. In fact, its quantum mechanics in action. When internal inflation, string theory, Copenhagen interpretation, and the Heisenberg uncertainty principle are thrown into the mix, we get a universe (our universe) created at the whim of a wave function, collapsing with the properties our universe has.
Again with just about everything skepticism is key.Mersini-Houghton, the main proponent of the landscape multiverse idea, is also a fan of string theory. Many of you may know of it as a discombobulated mess that belongs with the crackpot models of the universe instead of acting as if its even plausible to explain the properties of the universe. Were still in the beginning stages of uncovering many universal mysteries so more data is needed.
See the rest here:
The Multiverse: Is There Evidence For It? - Futurism
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