Is the universe a sphere?

Question

If yes, does the boundary separates existance from non-existance? and can an object travel beyond this boundary? or will the universe will have a gravitational field of it's own that will not allow traveling beyond the boundary, do other universes exists if yes where are they floating in?

Answer 1

I think that the universe is a subset of existence, not the totality thereof. I'll try to explain why I think so.

Suppose an astronaut were falling into a black hole - one large enough to permit him living passage through the event horizon. As he approached the event horizon, he'd be able to see the universe, the stars among which he was born, through a narrowing cone of light above himself. But the cone would be narrowing, narrowing.... At the moment he reached the event horizon, the last little dot of light from the outside universe would wink off. After this, there is no path that leads from the astronaut to the outside of the black hole. The black hole has become his new universe.

But can't the astronaut remember his home planet? Sure, as long as he's alive he can. If there's no path from inside the black hole to the outside, what relevance can this information have to the astronaut? Well, the relevance is that the black hole isn't all of existence. Someone BORN in the black hole might think so, since he'd have no way to prove otherwise. But the astronaut wasn't born inside; he just fell inside. He remembers another place.

Now, back to the original subject. The Big Bang was the beginning of time, and it serves us as the event horizon of the black hole served that astronaut. Once inside, there's no path back out. We were born in this universe, and so we remember no other place. But that doesn't mean that our universe is the totality of all existence. There may be another place, a place where quantum chaos events are, perhaps, the largest events which happen.

However, there's nothing like a boundary to our universe in space. The "edge" exists at the beginning of time. It's an initial terminus to events as ordered in time. But the existence of that boundary does not mean that there's nothing elsewhere; just because there's no path going to a place doesn't mean that the place doesn't exist: it just means you can't go there.

Answer 2

How do you presume to enlarge the logic of around bodies in area to the finished area being a sphere? i'm no longer saying you're incorrect, yet you should p.c.. aside your answer to be sure that it fairly is consistent. enable's ask, why are moons around? Why are planets around? Why are any "celestial bodies" around? First answer that question. next, does the universe proportion an identical characteristics as those bodies? "It basically is" has on no account been, and on no account would be, a scientifically valid answer. right this is an occasion (that's in all probability horrifically incorrect, yet basically an occasion). Say that the super bang surpassed off, and it grow to be like an explosion. each and each piece of the universe grow to be repelled from one single element with an identical volume of capability, in extremely some guidelines. Assuming they have an identical capability and equivalent mass, they are going to commute an identical distance. The smallest bits of count that have been shot out from the super bang, on no account collided with different debris, could all commute an identical distance at different guidelines faraway from the element to commencing place. What shape does that mean for the universe? A sphere! you have have been given to think of reason and result, guy. perchance there is not any real answer, yet you are able to no longer purely make random leaps of religion.

Answer 3

Einstein proved that the matter bends the universe. If there is enough matter, then it will bend so much that you go in a straight line and end up where you started.
Because it is believed that the universe started in one place with a big explosion that blew all matter apart and formed the galaxies we see today, it would be reasonable that the universe bends around the place of origin. Therefore it is reasonable to assume that the universe is a sphere.
If however, like some, if you believe there is not enough mass in the universe to bend space enough it can be almost any shape and goes on forever.

Answer 4

Modern physics explains that the universe is ever expanding at at a speed greater then the speed of light, so it wouldn't be physically possible to reach the edge unless the universe stopped expanding at which point we would have bigger problems. No one really can explain what is beyond the boundary its speculated that is just negative space, basically is just beyond our understanding. Their is a belief called string theory which trys to explain how and where our universe is and that their are very possibly others around us.,

Answer 5

Most research within the past few decades points to a flat universe. It's difficult to picture in three dimensions, but imagine a flat tabletop whose surface has definite dimensions, but exhibits the property whereby crossing over the edge of one side of the tabletop simply places you back at the edge on the opposite side of the tabletop. This is similar to the image of many classic video game screens, such as Pac-Man, where leaving the screen on one side makes your character appear on the opposite side of the screen.

The universe appears to function in the same way; there is a definite "size" to the universe, but its finite size has no true boundary conditions as it wraps infinitely back upon itself in whatever direction you travel. Note that this is the overall shape, averaged out over billions of light-years, and mass spread throughout the universe creates specific alterations of the space-time fabric at any given point where the mass present causes the curvature in space-time that is an expression of gravity.

Answer 6

no, the universe is not a sphere. i don't know what word to use to describe the shape of the universe, but it is four-dimensional. it may be something like the two-dimensional surface of a sphere. the universe has no center and no edge. there is nothing "outside" the universe, not even space-time. to quote a dead writer (1874-1946) "there's no there, there".

no one has proven the existence of any other universes. it is only hypothetical.

the belief that the universe exists in empty space-time is actually a common misconception. read this:
http://www.sciam.com/print_version.cfm?articleID=0009F0CA-C523-1213-852383414B7F0147

Answer 7

the universe isn't a sphere, the earth is!

Answer 8

There are more dimensions and more universes.Our mind finds it difficult to understand it

Answer 9

no its generally thouyght to be donut with a hole in shape

Answer 10

no one knows