What is the start and end point of universe?

Question

Why does universe has no start and end point, when everything inside the universe has one start and one end point?

Answer 1

it just keeps merging withother universes

Answer 2

Strangely enough, Chris M's answer can make sense. Fortunately, "me" can be interpreted as any person, or even any point, in the Universe.

If you look at the universe as the 3-D object that we can perceive at any time, it seems best to consider it an infinite object with no start point and no end point. If you have an infinite collection of objects of finite length, it is possible that the collection be infinite even though every single element is finite.

e.g., take the lenth [n, n+1), for example from 6 to 7. It has a length of 1. It is finite: it has a start point and an end point.

The number line is made up of an infinite number of such finite intervals, yet itself is infinite (there is no such thing as a "largest number" positive or negative).

If you consider the universe as a 4-D object (the 4th dimension being time), then there appears to be a start point: The moment in time called "Big Bang".

Of course, not everyone agrees that the universe was created at that moment from a singulatiry (single point of infinite density). Some believe that the moment simply marks the start of a new cycle, following a "collision" of membranes. Others still push the idea that the universe is eternal.

Still, if you were to run backwards the relative movement of that portion of the universe that is visible to us, you'd come to the conclusion that all the matter we can see was all piled up in a very tiny region some 14 billion years ago.

So, the universe that we know had some kind of start point in time, 14 billion years ago. There is still debate as to whether the universe has an end point in time. Is there enough mass that gravity will cause the universe to collapse onto itself? If yes, then our universe is a "closed" universe and will have an end point after a finite time. If no, then our universe is an "open" universe which will continue to expand forever (no end point in time).

For a while, it was thought that the universe was exactly between the two options: a flat universe whose end point, in time, was "exactly" after an infinite time.

If you consider the universe as a 3-D subspace of a higher dimension space, then it is possible that the universe is "boundless" without being infinite. For a crude example, consider the surface of the Earth as a 2-D object curved upon itself in a third dimension that would be undetectable. The surface of the sphere has no end point: you can travel in a given direction and never reach an end; however, you may notice that you have returned to your starting point, having never turned around.

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The reason that "me" can be any point can be explained with the number line: We take, as convention, that the centre of the number line is 0. Yet, you could put the centre anywhere. It could be, for example, number 105. From that point (or any other point identified with a finite number), it is impossible to tell that there are more numbers on one side than the other.

A quick proof? Take the original number line. Subtract 105 from all the positions on it. You get a new number line with a zero at the old 105 position. There are still infinitely many numbers towards the positive as there are towards the negative, therefore the new 0 (the old 105) is also a centre.

Answer 3

That is indeed a very difficult, yet common question.

I admit that i don't know the answer to such a question. In fact, i don't think anyone will ever know, but i would like to share my thoughts nevertheless.

I believe, that the universe has no start point or end point, because it probably already exists 'as it is.' A never ending cycle, till infinity. Creation to destruction to creation once again; there is beginning to every end...and an end to every beginning. Birth to Death to rebirth...you get the idea.

I also feel that, due to this infinite loop, we may not be the in 'first' universe. Perhaps the Big bang as theorized by scientists may have been the big crunch of a 'previous' universe.

Also, we as humans, have instilled in us a sense of mortality. Our life spans are relatively short, we are born from our mothers and die after a period. It is natural for us.

Hence, the reason why we perceive that things have a start and an end. Take for example stars. They are 'born' from massive floating gas clouds of hydrogen that stick together over billions of years, eventually creating a star with immense gravity that is so strong it shears electrons away from atoms resulting in nuclear fusion creating helium,gamma radiation as well as light.

Billions of years later, When a star has burned all its nuclear fuel, it 'dies.' By means of massive explosion; a supernova that contains the same matter which new stars may be made from. From this the cycle starts once again.

In reality, there is probably no beginning or an end to anything. Energy cannot be created nor destroyed, it merely transits into a different state.

In truth, such questions only raise more questions that we may never find the answer to. Perhaps the vastness of the universe, why even light has finite speed, why light is affected by gravity, what are blackholes...even the very rules of nature, are just God's way of showing us his supreme and incomprehensible being. His masterpiece is our playground.

And even if one day we do find out how the universe starts or ends...the real question we should be asking is, does it matter?

Cam

Answer 4

The universe had a start point somewhere around 10 to the minus ninety-five from zero second.
Defining the end point,which we seem to have no clue of how or when may be difficult.
While a mature universe took one thirty-billionths of a second the end point may take billions of years.
A quanta of space whose pressure has been reduced to a minimum may wink out in,again 10 to the minus ninety-five of a second.
A mature universe ; was a 1cm diameter ball whose radial velocity had just reached the speed of light.
The pressure of it"s substance[space] is at the maximum that it will ever attain.
There was no gravity,no electromagnetism,no strong or weak forces and no matter.
It contains a percentage of quantum errors,this is the quantum effect that will result in the universe that we see to-day.
We can tell how a hurricane started,it"s growth and it"s fury,but the last wisp of it"s life may be unpredictable.

Answer 5

Lets say the universe begins here. That's the beginning. Now go travel the entire universe until you get back here. this is the end.

Answer 6

That's the mystery of the universe...the matter inside the universe is finite while the universe itself is infinite. Some things are not meant for us to comprehend.

Answer 7

beyond what we see in space via our instruments is

ARegion of Void out beyond the far and last galaxy we will ever see

there in this region there is no light , very litlle mater , almost a vacum
and no stars and abslute zero temperture if you ever manage to cross it you would come to another patch of light

these would be the shine of another distance galaxies in another universe

yeah that my take on it There are other universes outthere our is just like an island in the pacific ocean

cross it and you meet something esle

Answer 8

It is me, I am the start and the end of the universe all revolves around me!

Answer 9

No beginning. No end. No finite. No infinite.
All beginning. All end. All finite. All infinite.

Answer 10

i don't know why don't you get a starship and accelarate beyond warp 10 to find out