Our cosmos began to exist some 13.75 billion years ago. Primordial light began to shoot throughout the cosmos and spread throughout the early universe very shortly after that. The universe itself was expanding at this point. After the first initial burst, the universe’s inflation slowed, but since then, under the influence of dark energy, the pace of expansion has been continuously growing.
In essence, the universe has expanded at an ever-increasing rate since it first began. The earliest photons that humans can observe, according to cosmologists, have travelled 45–47 billion light-years since the Big Bang. Thus, the size of the observable universe is around 93 billion light-years (give or take a few light-years). There are 93 billion light-years between them.
Beyond What We Can Now View, There Is A Much Larger Universe.
If the universe is just 13.8 billion years old, how can it be 93 billion light-years across? That distance hasn’t been covered by light in time…? The answer to the question of whether we could ever travel to the boundary of the observable universe and what lies beyond is ultimately found in knowing this aspect of physics.
To explain, special relativity states that close objects cannot move at speeds greater than the speed of light with regard to one another, however there is There is no such law for extremely far apart objects when the distance between them is expanding. The distance between items is expanding, which causes them to fly away from each other at incredible rates, not that objects are moving faster than the speed of light.
This ultimately means that we could only get to the edge of the observable universe if we devise a system of transportation that enables us to: 1) Travel faster than the speed of light (which most physicists believe to be impossibly impossible); or 2) Transcend spacetime (by using wormholes or warp drive, which most physicists also think is impossible).
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We Are Missing Out On A Large Portion Of The Universe. What Precisely Are We Lacking, Then? What Exists Beyond The Known Universe?
Unfortunately, we have no idea what lies outside the observable universe because we can’t see it or measure it. However, there are a number of hypotheses that explain what is beyond the immense unknown.
This initial concept is one of the simplest to understand despite its weirdness. According to astronomers, the universe beyond what can be seen may be a limitless expanse of matter that is distributed nearly identically to that of the observable universe. This appears logical. After all, it is illogical for one region of the universe to differ from what we observe in our surroundings. And who can imagine a cosmos with an end, with a big brick wall waiting at its edge?
Infinity therefore makes sense in some respects. However, “infinity” implies that once you go beyond the observable universe, you won’t only find additional planets, stars, and other kinds of matter—you’ll finally find everything that may possibly exist. Every. Possible. Thing. That implies that, if this is true and we pursue it to its logical conclusion, there is someone else out there who is exactly like you in every manner imaginable, and there is also a version of you who is only marginally different from you in every way imaginable.
(One is one inch shorter; one was killed after being hit by a bus five years ago; one is missing a finger, etc.) The only difference between you and this “other you” is that they just picked their nose while you didn’t (or did you? ), and this “other you” may even be reading this article right now. This idea appears incomprehensible.
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It’s Difficult To Imagine Infinity.
In 2008, scientists found something quite weird and unexpected: galaxy clusters were all travelling in the same direction at incredible speed, nearly two million miles per hour. Another explanation deals with something termed “dark flow.” Massive structures outside the observable universe that are affected by gravity are one potential source. The buildings themselves could be anything, including: Stunningly large
gravitational forces from other universes are being channelled through strange space-time warps, accumulations of matter and energy (on scales we can hardly comprehend), or even both. Simply put, we have no idea what these enormous objects might be. Notably, subsequent assessments have asserted that the dark flow hypothesis is unfounded, but this assertion is still under debate.
A world of universes is an additional possibility. Some theorise that the entire cosmos might be contained in a tiny “bubble” in the middle of an enormous number of other bubbles. These parallel worlds can interact with one another, according to a theory known as the “multiverse,” which also suggests that a Big Bang similar to the one that produced our universe might happen as a result.
FAQs: People Also Ask
Is it possible to reach the furthest reaches of the cosmos?
Unfortunately, because the universe is expanding theoretically at a rate faster than the speed of light (due to the expansion of space between matter), it is impossible to ever reach the “edge” of the universe because it will always be expanding away from us at a rate faster than we could ever expand towards it!
What is the size of the universe?
The total distance to the observed cosmic horizon, when calculated with all of the information at our disposal, comes to a singular value of 46.1 billion light-years.
What exists outside of the cosmos?
The cliché response is that there is nothing outside of the cosmos because space and time were both formed during the big bang, which occurred approximately 14 billion years ago. The observable universe, which is estimated to be 90 billion light years across, is only a small portion of the entire cosmos.
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