can anyone tell me?

Question

where does the univerese begin and where does it end?

Answer 1

It would appear (given the recent observations of WMAP) that if you look at the universe in 3-D, it is infinite (it does not begin anywhere nor end anywhere -- it goes on forever in all directions).

If you look at the universe as a space-time continuum (3 spatial dimensions plus time, as it is done in the theory of Relativity), then it may still be infinite in the 3 spatial dimensions, but it has a beginning in time (13,700,000,000 years ago); we do not know yet if it will have an end in time (present observations appear to indicate that it may expand forever).

Because light travels at a finite speed, we cannot see light that would have had to travel more than the age of the universe to get here. So, even if the universe is infinite, we cannot see things further than 13.7 billion light-years away.

If a galaxy is located 20 billion light-years away, its light would never have had the time to reach us. That part of the universe is unknown (and unknowable) to us.

In a way, you could say that "our" universe has a radius of 13.7 billion light-years. In any direction, if we try to look that far away, we "run out of time".

Answer 2

The current theory about the Big Bang that was the beginning of the universe states that the entire universe was created at that instant. The universe has been expanding since that time 13.8 billion years ago - that expansion is actually creating the universe and space.
So there is no place that is the beginning or the end of the universe (which is hard for us to imagine, since everything we are familiar with has a start and an end.

Answer 3

It is possible to some degree to explain infinity in terms of shapes. So the answer to "What do they mean when they say 'It's infinite'" can be found in the mathematical science of topology, which is the study of shapes.

On the shelf above my desk, beside the monkey skull, I have a clear plastic model of a thing called a Klein Bottle. The Klein Bottle is a topological thought experiment that shows an object or an area of space that is both finite and infinite at the same time, and is capable of being itself, something inside itself, and something outside itself, all at the same time!

I like to look at the thing and use it to help me visualize these impossible relationships. The plastic model can't really do those things, but endless space does them at every moment.

To see what I am talking about, do an internet search on "Klein Bottle." I promise you enlightenment, if you will use your imagination.

If I sound like Obi-Wan Kenobi saying "Use the force, Luke..." then you're on the right track.

Answer 4

The Universe is consideredto be homogeneous,which means that on very large scales, there is no difference from on point than another, so there is no center, nor an end.

Think about moving around the surface of a sphere (the Earth, for example) You couldnt describe a 'center' of the surface, or an end.

Answer 5

The Universe is by definition - everything and infinite.

There would be no beginning or end.

You may find this link interesting

http://www.astronomyinfo.pwp.blueyonder.co.uk/The%20Universe.htm

Answer 6

the most popular idea is that its 4 dimensional. so there is no end and no beginning, once you reach the end your right back where you began.

Answer 7

I would honestly have to say that the universe is ever lasting.

Answer 8

It doesn't. Its beginningless and endingless! Apparently our brains cannot imagine it.

Answer 9

In your mind

Answer 10

its got this infinite thing going on