The trite answer is that both space and time were created at the big bang about 14 billion years ago, so there is nothing beyond the universe. However, much of the universe exists beyond the observable universe, which is maybe about 90 billion light years across.
The current width of the observable universe is about 90 billion light-years. And presumably, beyond that boundary, there's a bunch of other random stars and galaxies.
Thanks to dark energy and the accelerated expansion of the Universe, it's physically impossible to even reach all the way to the edge of today's observable Universe; we can only get a third of the way there at maximum.
The Big Crunch is a hypothetical scenario for the ultimate fate of the universe, in which the expansion of the universe eventually reverses and the universe recollapses, ultimately causing the cosmic scale factor to reach zero, an event potentially followed by a reformation of the universe starting with another Big ...
However the current record holder for the biggest of these structures is the Hercules-Corona Borealis Great Wall. Discovered in 2013, it spans 10 billion light years – more than one-10th the size of the visible Universe.
Because space isn't curved they will never meet or drift away from each other. A flat universe could be infinite: imagine a 2D piece of paper that stretches out forever. But it could also be finite: imagine taking a piece of paper, making a cylinder and joining the ends to make a torus (doughnut) shape.
The multiverse is the hypothetical set of all universes. Together, these universes are presumed to comprise everything that exists: the entirety of space, time, matter, energy, information, and the physical laws and constants that describe them.
The world as we know it has three dimensions of space—length, width and depth—and one dimension of time. But there's the mind-bending possibility that many more dimensions exist out there. According to string theory, one of the leading physics model of the last half century, the universe operates with 10 dimensions.
The fate of the universe may be determined by its density. The preponderance of evidence to date, based on measurements of the rate of expansion and the mass density, favors a universe that will continue to expand indefinitely, resulting in the "Big Freeze" scenario below.
The universe could shrink just enough to return to a state similar to its original conditions. Another Big Bang – also known as a 'Big Bounce' – could then occur which would create a new universe from the old one. This cyclical pattern of expansion and contraction would constantly collapse and remake the universe.
The universe will get smaller and smaller, galaxies will collide with each other, and all the matter in the universe will be scrunched up together. When the universe will once again be squeezed into an infinitely small space, time will end.
The universe will die. Eventually it will become nothing. In roughly a quadrillion years, a last star will give its last twinkle, and black holes will devour everything before they completely evaporate. And in a googol years (that's 10 to the hundredth power, which is a lot), the universe will be empty.
In the Discursive Condition, then, time is finite because it can exist only as a dimension of events and is not an infinite and neutral envelope for them.
Many religious persons, including many scientists, hold that God created the universe and the various processes driving physical and biological evolution and that these processes then resulted in the creation of galaxies, our solar system, and life on Earth.
The average temperature of the universe is downright cold – right around 3 degrees above absolute zero. In order to measure the temperature deep space there must be a substance, because this is how we define temperature.
The scale of a human is less than 1/5,000,000 the scale of Earth, but Earth is just a proverbial drop in the cosmic ocean, with a diameter of only a little over 10,000 kilometers.
22 billion years in the future is the earliest possible end of the Universe in the Big Rip scenario, assuming a model of dark energy with w = −1.5.
Eventually, the entire contents of the universe will be crushed together into an impossibly tiny space – a singularity, like a reverse Big Bang. Different scientists give different estimates of when this contraction phase might begin. It could be billions of years away yet.
Today this is largely carried out in the context of the ΛCDM model, where the universe is assumed to contain normal (baryonic) matter, cold dark matter, radiation (including both photons and neutrinos), and a cosmological constant. and. , are the most important. 14.5 billion years.
Pet peeve alert: contrary to assertions in some bad sci-fi, it is impossible to travel to a dimension. We can only travel in a dimension. In three-dimensional space, we can move along an x, y or z axis or some combination of those, but not to x, y or z.
So you don't necessarily have to look up but you can look out and see heaven. Heaven is a fourth dimension if you will," he tells Walters.
According to this model, there are only three dimensions of linear direction: variations of up, right, and forward. In other words, height, length, and width. But even with all the practicality of Euclid's model, the concept cannot be mathematically proven, opening the doorway to another fourth direction.
Therefore, our universe is called the cosmos.
Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
“It's conceivable,” he says, “that being more disciplined in how you use probabilities can actually resolve the measure problem.” This possibility has softened his view on the multiverse, says Albrecht, though he's still skeptical. He now puts a 10 percent chance on the likelihood that we live in a multiverse.