Do anyone know the size of the UNIVERSE?

Question

What is the lifespan of the Universe

Answer 1

Certain scientists have made educated guesses as to the size of our universe. However, I don't think that it can be measured in the same way that you'd measure your room.

If Albert Einstein and Stephen Hawkings are correct, the universe is better measured in terms of time than in terms of space.

It's kind of like E equals MC(squared). We know that we can split an atom by taking matter to a "critical mass," but whether that critical point is actually the speed of light squared is merely speculation.

I also think that everyone, even serious scientists, WANT the universe to have boundaries because everything in our experience and our perception of the world is defined by boundaries. Therefore, it is impossible for us to conceive of the existence of something that is not defined in the terms that we undrestand.

Answer 2

As to your first question, there are equal argiments as to an infinite universe or a bounded one. The explanation i prefer is that we are on the surface of an expanding 4-dimensional sphere. In that way, our universe is infinite in the sense that if you go in one direction long enough, you end up where you started. As to your second question, the lifespan of the universe depends on how much matter there is in it. If it is above a certain threshhold, gravity will eventually slow expansion and cause the universe to collapse back in on itself (giving it a finite lifespan). If it is below that threshhold, the universe will continue expanding forever and will have an infinite lifespan. Hope that helps you understand!

Answer 3

Nobody knows - we do know it is at least something like 10 billion light--
years in radius, because we can see stars out that far. Most people think
the universe is infinite, at least in some sense, so that it really does not
ever "end". Since we don't know the size of the Universe I guess we won't be knowing the lifespan of it.

Answer 4

Writers on cosmology appear to speak with authority on the history of the universe. They describe its earliest moments in detail, and discuss its present structure and future large scale development. But many of their pronouncements have to take the form, "If such-and-such is true, then so-and-so. And if not, then ..." In fact our quantitative knowledge of the universe is very incomplete. True, we know the approximate distances of many celestial objects, both near and far, and we know the age of the universe fairly accurately. Although from time to time the different ways of calculating this age have produced results which appear inconsistent with the known ages of the earth and the stars, there is now general agreement that the big bang occurred between 10 and 15 billion years ago. But estimates of the present size of the universe, or the amount of matter and radiation it contains, differ widely, and any predictions we wish to make depend critically on these quantities. Indeed there is disagreement over whether these magnitudes are finite or infinite; surely this uncertainty is of considerable importance.

Answer 5

We can make estimates of its size, but no one can measure it accurately. The number in the other guy's article is just based on the fact that the Universe will evolve just like we expect it to. Alot of the debate on the size of the Universe eventually ends up on will it expand forever therefore making a Universe that is infinite in size or will it stop one day therefore finite or will it crunch back in also finite. This fate depends on the cosmological constant introduced by Einstein in his field equations of gravity which he called his biggest mistake. Although it was thought to be a mistake at the time, today's cosmologists are actually leaning towards having a cosmological constant. In short, the observable Universe has a radius of 13.7 billion light years, but the actual Universe, only estimates can tell us...

Answer 6

The universe is like an expanding balloon that is very vast and wide.
The universe will keep on expanding this is called the Steady State Theory and when its starts to form neutron stars black holes and magnifying of the universefloor this is now a Big Crunch Theory then reaches the expanding limit then suddenly exploded is now the Big Bang Theory. Its like a never ending life cycle.

Answer 7

The size of the universe is presently unknown, and it might not be possible to measure it. However, it should have a radius greater than 13.7 billion light years because that is about how old it is.

We also do not know how long the universe will last, but it should be at least a few billion years more, and it might last forever.

Answer 8

Imagine the largest space you can consider, then multiply that by itself, and continue to do so until you can imagine no more, then you may reach the smallest portion of the universe's size. OR better yet, imagine everything you know of space as we know it today, and consider that is all fits in the eye of a needle, and even then you will have only scratched the edge of such vast distances, that only the mind can understand.
For there exists an entire universe within the eye of a needle, equal to that of the one in which man believes he is alone!

Answer 9

I'm sorry if this sounds mean, but the people who posted above are showing a lack of ability to even look for information!

The known universe is a little over 150 billion light years across.

Answer 10

Hi,
Speaking convetionally , the answer is something close to "Infinity," But scientifically speaking, taking the case of our own solar system as an example, we all know that our sun is mostly composed of hydrogen and helium, and always hydrogen is getting converted to helium, at one point of time, the nearby planets tend to come closer to the sun and gets itself destroyed into the sun....... and also controrary to it, we should remember that our sun is also a star, and ofcourse, one of the stars in the universe, and we should remember that innumerable new stars are created in the universe for various reasons, and it is a continues process.....