In the other direction, into the future, time seems to be unbounded, though this is less certain, it depends very precisely on several cosmological parameters, whose values are not yet certainly known. So our current best hypothesis is that time is finite into the past, but infinite into the future.
In the static view, if there is actual infinity in the physical world, time could have an infinite past. However, even if there is actual infinity and time is discrete, time could not have an infinite past in the dynamic view (although finite time can flow).
There's a limit to how much of the universe we can see. The observable universe is finite in that it hasn't existed forever. It extends 46 billion light years in every direction from us. (While our universe is 13.8 billion years old, the observable universe reaches further since the universe is expanding).
As we pass from one space to another we are still in space, arid all finite spaces are parts of space itseff,— the all comprehensive and necessary reality which makes finite spaces possib'e. Hence, space is limited only by space, i. e. self-limited, i. e. universally extended and infinite.
Einstein's general theory of relativity predicts that time ends at moments called singularities, such as when matter reaches the center of a black hole or the universe collapses in a “big crunch.” Yet the theory also predicts that singularities are physically impossible.
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. False vacuum decay may occur in 20 to 30 billion years if the Higgs field is metastable.
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 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.
There's no time without space
In short, the time you experience depends on your velocity through space as the observer. This works as outlined through Einstein's special relativity, a theory of how speed impacts mass, time, and space.
Instead, space and time themselves are considered products of a more fundamental projector reality. Nathan Seiberg, a leading string theorist at the Institute for Advanced Study at Princeton, New Jersey, is not alone in his sentiment when he states, “I'm almost certain that space and time are illusions.
According to the Infinity Argument, an actually infinite regress of past events cannot exist because an actual infinite cannot exist. The Infinity Argument is one of the most common arguments for a beginning of the universe espoused by advocates of the kalām cosmological argument.
So far, the evidence supporting the idea of a multiverse is purely theoretical, and in some cases, philosophical. Some experts argue that it may be a grand cosmic coincidence that the big bang forged a perfectly balanced universe that is just right for our existence.
It appears that space was created in the Big Bang, 13.8 billion years ago and has been expanding ever since. The overall shape of space is not known, but space is known to be expanding very rapidly due to the cosmic inflation.
Absolute, true, and mathematical time, of itself, and from its own nature flows equably without regard to anything external, and by another name is called duration: relative, apparent, and common time, is some sensible and external (whether accurate or unequable) measure of duration by the means of motion, which is ...
Each year is separated from any other by a finite number of years (remember that there's no first year). There never was a time when the past became infinite because no set can become infinite by adding any finite number of members. So, if the past is infinite, then it has always been infinite.
According to the standard big bang model of cosmology, time began together with the universe in a singularity approximately 14 billion years ago.
According to theoretical physicist Carlo Rovelli, time is an illusion: our naive perception of its flow doesn't correspond to physical reality. Indeed, as Rovelli argues in The Order of Time, much more is illusory, including Isaac Newton's picture of a universally ticking clock.
In zero seconds, light travels zero meters. If time were stopped zero seconds would be passing, and thus the speed of light would be zero. In order for you to stop time, you would have to be traveling infinitely fast.
Near a black hole, the slowing of time is extreme. From the viewpoint of an observer outside the black hole, time stops. For example, an object falling into the hole would appear frozen in time at the edge of the hole. Inside a black hole is where the real mystery lies.
Some theorists have even argued for more, up to an indefinite number of possible dimensions. Other physicists suggest that experimental results have thrown cold water on the case for higher dimensions, leaving us only with the familiar three dimensions of length, width and height, plus the dimension of time.
Compared to what the future holds for us, we're presently only seeing 43% of the galaxies that we'll someday be able to observe. Beyond our observable Universe lies the unobservable Universe, which ought to look just like the part we can see.
Practically, we cannot even imagine thinking of the end of space. It is a void where the multiverses lie. Our universe alone is expanding in every direction and covering billions of kilometres within seconds. There is infinite space where such universes roam and there is actually no end.
Most of the laws of physics, like gravity and quantum mechanics, are symmetric with respect to time. That means that it doesn't matter whether time moves forward or backwards. If time ran in reverse, all the laws of physics would work the same.
Also called tem·por·al par·a·dox . (in science fiction) a hypothetical contradiction of cause-and-effect within a timeline that results from traveling back in time, as in the bootstrap paradox or the grandfather paradox. Sometimes par·a·dox of time .
There are known to be solutions to the equations of general relativity that describe spacetimes which contain closed timelike curves, such as Gödel spacetime, but the physical plausibility of these solutions is uncertain. Many in the scientific community believe that backward time travel is highly unlikely.