is the universe infinite or it has an end or a corner somewhere?
412270
The universe in which we live is about 156 billion light years across.  Source: news.bbc.co.uk/1/hi/sci/tech/3753115.stm  Whats beyond that, good luck
1043703
The ... implies an endless continuation of the series.  So the answer is \n\nINFINITY.
657544
Isn't the universe infinite? How can it have a definite radius or circumference if it's infinite?
40749
Sorry, as Braxton points out, the size to the edge of the observable universe is 78 billion light years due to the expansion of the universe (same source as the other guy used, Wikipedia) There is much debate as to whether or not the universe is infinite, but many scientists believe that the universe is indeed finite in size.\n\nBY THE WAY: I find it comically amusing how two people can cite the same source, yet somehow I'm the wrong one.  Oh well ;)
626622
The universe is an indefinite entity.It is bounded by 'nothing' even in the strict sense of modern physics.
333652
Once you leave the Milky Way you are not outside the universe. The Milky Way Galaxy is one of many known galaxies in the universe. There are probably billions we don't know about. "Goodness knows where" is inter-galactic space.\n\nInfinity means "forever". It is not necessarily a measurable distance or time. We're not sure if the whole universe is infinite. We can't even see most of what is out there. The estimated size of the observable universe is 7.4x10^26m (that's really, really, really, really big). Beyond that we're not sure yet.
674188
well, spacetime does not seem to end, and nothing is "holding up" spacetime.\n\nthe universe is not infinite. the universe is finite yet has no edge and no center. it may be something like the two dimensional surface of a sphere. nothing inside or outside the sphere exists for the two dimensional surface.\n\nalso, i have something for you to think about. the radius of observable universe is about 46 billion lightyears, yet the universe is 13.7 billion years old.
1098923
There is an end to this universe.  But, it is constantly expanding and contracting.  Empty space is what lies outside of it.  The universe is encroaching into empty space.
10099
Just supose that the universe end in some point, that has a boundary. What would be outside? Nothing? And... what is between Mars and the Earth? Also nothing. The universe is... "the nothing", and never ends. Anyway, and suposing that you forget the relativity theory and you want to know where is the star/planet/thing that is farest from the "centre", you can say that the radius of the universe is less or equal to the speed of light times the age of the univers.
104718
well... the universe is not infinite or so say today's scientists. according to the parallel universe theory,there are various universes and our's is one of 'em . well one cannot really define the *length* of a universe because it is almost impossible to percieve something that big for the human mind.
412853
First off you have a real good question.  As a matter of fact I used to think like this during my high school years.  \n\nInfinity in cosmology\nAn intriguing question is whether actual infinity exists in our physical universe: Are there infinitely many stars? Does the universe have infinite volume? Does space "go on forever"? This is an important open question of cosmology. Note that the question of being infinite is logically separate from the question of having boundaries. The two-dimensional surface of the Earth, for example, is finite, yet has no edge. By walking/sailing/driving straight long enough, you'll return to the exact spot you started from. The universe, at least in principle, might have a similar topology; if you fly your space ship straight ahead long enough, perhaps you would eventually revisit your starting point.\n\nIf the universe is indeed ever expanding as science suggests then you could never get back to your starting point even on an infinite time scale.
400393
Hm - depends what you believe.\n\nI was taught (admittedly decades ago) that the Universe was infinite (in three dimensions) but bounded (in a fourth dimension).\n\nTo illustrate: the surface of an football is infinite (in two dimensions) but bounded (in a third dimension). A very flat insect (representing a two-dimensional life-form) can crawl in a straight line forever - therefore, from his perspective, it's infinite. It has no end.\nBut obviously we can see that the footbal is bounded in a dimension in which the insect cannot move.\n\nSo, the answer to your question would be:\n  yes, there are boundaries to the universe, but\n  no, we can't reach the "ends" because there are no ends in any sense we can understand them.
722611
the universe is constantly expanding although the rate is slowing and never reaches zero.\nexperts believe that the universe is finite yet has no edge, just like the surface area of a sphere. this could imply that if u reached one 'end' of the universe, u would end up on the opposite side or something like that
53803
According to modern physics, yes. Any infinite universe would actually contain an infinite amount of data, and thus would be aware of its own existence as well.If, however, you define universe as 'infinite' or 'everything' then no.
334137
the universe is finite yet has no boundaries. it may be something like the two dimensional surface of a sphere.  nothing inside or outside the sphere exists for the two dimensional surface.  nothing exists outside the universe in this model.
1103661
yups thats something even i was wondering for quite some time, but then i thought like on earth , its so big seems to be endless\n\nbut then the end you think has a wall and even a wall has another side to it, there surelyis  something on the other side\n\nso for sure we never wou;ld be able to describe it but surely the universe the galaxy is endless\n\nso keep your thinking hat on and just start this journey of imagination of what all could be there.....................a sun,,,,,,,,,,ocean,.,...........aliens with PS1001..........................or an church for an alein god.................
1101831
everything is made up of energy so if space is infinite then something must be there and if something is infinitely there then energy would be infinite