Earth is in solar system,solar system is in a galaxy, our galaxy one in trillion in the whole universe.. where does it end? if theres beginning there should be an end.
212185
There is no boundary as such because there is "nothing" beyond the edge; but the Universe in not infinite.  Difficult to get your head around I know especially as "nothing" in this case does not mean nothing as you understand it now.  If I go on you might blow a fuse so I will stop there.\n\n[re: above - "The Milky Way" is the name of our Galaxy not our Solar system]
282388
The universe cannot have an end, it has to be infinite and completely symetrical. This leads to three possible scenarios for its shape a saddle shape, a spheroid, and a flat plane. Different experiments have led scientists to believe that space is an infintie flat plane. The main reason why we know that if there were edges to space then we would have to me moving towards some objects and away from others. This is not the case as all observed entities are moving away from us. This leads to the assumption of a infinite expanding universe. \n\nAs far as our perception is concerned we are not inside of anything since the universe occupies all of the space that we can observe so the universe is everything. But if somehow you could step out of our universe into a higher dimension you dont know what you would see. There are some theorists who believe our universe is one of many universe. But since there is no way to see out of the universe we may never be able to answer this question. I agree that if you start thinking in this manner it can get quite perplexing\n\nTo the person who said space must have an edge to expand think of a baloon. If we go down a dimension imagine that our galaxy is a penny glued on the surface of a baloon. To us the baloon has no edges at all since we cannot see out into the third dimension, yet the baloon is expanding. So from our vantage point we live on an infinite surface that is expanding and causing nearby pennies to all travel away from us.
334158
Universe theories talk about a finite and unlimited Universe. The Universe is unlimited because it has no boundaries. There is no edge, no end where a spaceship would have to stop. See it as a tiny bug walking on the surface of a big balloon. The ballon has a finite dimension, but the bug will never find the end, so it is unlimited from the bug's point of view.\nSo, the Universe can be expanding or contracting or staying the same size. This is a very important question to answer in modern astronomy. Latest studies say that it is expanding, but it has not been totally proved.\nAnd where it is expanding? The Universe is creating more space and time where there is nothing.
286848
No body know for certain. However, the universe is so vast, with so many celestial bodies that it seems rather improbable if the only place in the whole mutiverse that harbors life is planet Earth.
462641
Must have been some terrific star ship if one ship could help earth people kill everything in the universe.\nSince we can see out 13.8 billion light years, that's a heck of a lot of space to rocket around in to find everything to kill.\nBut since there are still some earth people left, maybe we'll just repopulate the universe.
573622
Plate tectonics?  The sun running out of hydrogen?  You people are nuts.  There is a freaking BLACK HOLE at the center of our galaxy!  Who is going to save us?  Who will stand up and protect the next generation from this threat, a threat that will not only crush us and stretch us out over millions of light years, but convert all our precious bodily fluids into pure energy!  It's a fate unthinkable, all of our precious carbon, poof!  Doesn't anyone care?
331443
By definition, the universe is a singular entity and no other exists except in theory (ex. Inter-dimensional universes, sub atomic universes and anti-matter universes). If we consider the universe as finite instead of infinite, then we can roughly conclude that it is spherical in shape, and the outermost bodies are roughly equidistant from the center. \n  In Einstein’s theory of the Time and Space continuum, Time and Space are cylinders and the intersection of two cylinders is a sphere. as the intersection of the cylinders change, so does the location of that sphere, It can be see as moving through time, or moving through space, or moving through time and space simultaneously.\n    Not all possible points of time and space are contained with that sphere at one time, but the sphere can pass through them and we move through time and space. Once a point has passed though our sphere it is gone.\n\n   UNLESS the cylinders are actually rings. The intersection of the two rings is also a sphere. In this case, a point can pass through our sphere several times as we are in constant any yet synchronous motion with the other ring. So if our universe is actually a sphere, and the intersection of circular cylinders (rings), galaxy will always be a galaxy, but it can come into existence, die and be reborn all within it's own space it passes through our sphere of existence over and over again.\n\nSorry...this was probably more than you wanted. It's possible, yes, but not likely in this sphere of reality.
331044
Same god. different perspective. we haven't seen even our solar system from all sides yet. The god I believe created universe can not be understood completly ever.
330411
Earth and all the planets in out solar system are orbiting our Sun. The Sun and all stars are moving in space, but those other stars are not moving around US; they are orbiting the center of the Milky Way galaxy. Because the stars are so far away from us it takes thousands of years before they have moved far enough for us to notice it from so far away, but astronomers have made careful measurements with telescopes and can detect small position changes, which they call "proper motion". I googled "proper motion" and below is the first result.
297767
as far as we can tell, the universe is bigger than anything else ever.  the old school of thinking is what named the universe (from Latin, uni = one, verse = turn, ...) and the thought was that it went forever and contained everything.  some dictionaries may have something different to say.\n\nif the universe is finite, then what is at the edge of the universe?  what may lie beyond the universe?  are there other universes?\n\nask God when you get to heaven i suppose.
506745
Water is a necessity for life and that is based on temperature more so than which planet you are from the sun, it could be the tenth planet from the sun as long as the temperature is similar to ours here. \nBut with so many galaxies and suns in the universe I'm sure somewhere there is another world much like our own.\n\nHeres something you might like it shows everything that we are able to see in the universe and zooms down to our solar system.\n\nhttp://www.atlasoftheuniverse.com/universe.html
238065
Our galaxy the Milky Way contains about a hundred billion stars, there are billions of galaxies out there. I think man would be presumptious to the extreme if he believed he were the only intelligent life to exist in all of creation. I am sure with all the advances in technology, that within twenty years a signal will be picked up, that unmistakeably answers your question: We Are Not Alone!
109290
Think of the universe as a giant bubble. Outside the bubble is nothing. nothing exists. no space. no time. Even though there is an edge to the universe, you cant reach it. If you started at the earth and went in a straight line. you would eventually come back to the earth. Also, we are not the only universe. there are other bubles. too. they are in the same nothing as ours. But you could not travel to other universes.
621167
There are billions and billions of planets in our universe.  We know little about the vast majority of them, and to think that there is no intellegent life on another planet is arrogance on our part.
599198
If the universe is everything, then what is it expanding into?\n\nBefore we can address that question, we must first define universe.  \n\nThe word universe denotes all space and everything (matter, energy) contained within it.  The prefix uni means one.  The root verse means word, carnate message, meaningful substance, matter.  Questions regarding our universe persist today.  Does it have a beginning and end, or does it go on forever and ever?  Is it linear or curved?  If it has limits of length or curvature, then what lies beyond the Universe?  If something lies beyond the Universe, then can’t we accurately call that the Universe?\n\nSome lay people and some scientists conceive of the universe as infinite space.  Others define the universe as finite, or limited (perhaps curved), space.  Still others incorporate the elements of matter and/or energy into their definition of the universe, as opposed to the space beyond matter and energy.\n\nGiven these concepts of our universe, some scientists conclude that the “totality of space could be infinite. Shrink an infinite space by an arbitrary amount, and it is still infinite. (Scientific American March 2005).”  \n\nAs to the notion that we live in an ever expanding universe, moving away from every other universe on the fabric of space-time, some scientists are careful to point out that “\n\nAndromeda, our nearest large galactic neighbor, is actually moving toward us, not away. Such exceptions arise because Hubble's law describes only the average behavior of galaxies (Scientific American March 2005).”\n\nIn accordance with your supposition that our universe is in another universe, “it has been hypothesized by some scientists that the universe may be part of a system of many other universes, known as the multiverse (http://en.wikipedia.org/wiki/Universe).” Modern astrophysicists talk about multiple "pocket" universes that branch off from one another.  Stephen Hawking points out that parallel pocket universes can have no effect on a real observer inside a single pocket, so, according to Hawking, they are theoretical baggage that should be eliminated from cosmology, the study of the origins of the universe.\n\nSome string theories define the universe as a three-dimensional space in an invisible space having more dimensions. This is, in essence, a universe within a universe.  Our zone, a “braneworld” could periodically bounce into another parallel braneworld.  This may create what would appear as a Big Bang from one perspective or a Big Bounce of alternating expanding and contracting universe from another perspective.  Such a cataclysmic event is thought to occur 300 billion years from now, resulting in the rearranging and creation of a new universe.\n\nIf the universe is everything, then what is it expanding into?  It seems that our universe is all matter, space, and energy that we can perceive in this closed system.  However, that does not mean that there is not additional matter, space, and energy outside our universe.  In other words, there are probably other universes.  Therefore, the zone that we call our universe (or braneworld) may be moving through or expanding into other universes (or braneworlds).  In sum, all universes may be moving through a multiverse.\n \nSteve\n:-D
142254
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.
84331
Well, I don't know if you meant Universe's or a Gaalaxy, but assuming you meant Universes...\n\nThe word Universe is used to to describe the entire physical world. Meaning everything that is in space, every planet, star, comet, etc. is all part of the Universe.\n\nWhat some physicists have speculated, is that there may be "alternate universes". Universes that we cannot see because they are in different dimensions then we are. \n\nWe live in a four dimensional world. We have the three dimensions of 1. up an down, 2. right and left, 3.back and forth, and 4. time. \n\nIt is hard to comprehend extra dimensions, but some physicts have speculated that the extra dimensions may be incredibly small, and every time we move, we push them aside, but not into them.\n\nIt get's rather complicated, but this theory is used in some modern physics theories, such as String Theory.\n\nWe cannot access alternate universes even if they do exist, because we do not live in those dimensions. So as far as we know, the answer is no.\n\nYou also have to realize how incredibly vast space is. Astronomers use "light-years" to measure distance in space. 1 light-year is the distance light would travel in 1 earth year. That is a very, very large distance. So it is difficult to send spacecraft anywhere far even in our own universe.\n\nI am no expert though, and would reccomend searching wikipedia.org for answers.\n\nGood luck!