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I am a software engineer and not an astrophysicist but I want to know if anyone...

I am a software engineer and not an astrophysicist but I want to know if anyone is working on sorting out what exists outside the universe?

So what about outside spacetime? what is there? or shall I assume there are infinite galaxies? and even that is not a satisfying answer. I know this question might get closed soon ... but guys please tell me what is there outside the space as we know it? since childhood I have wondered about this.

Its really a simple question. If we say that we live "inside" a Universe ... then we are objectively saying that there IS something "outside" the universe as well? Am I crazy? What exists there? Is it just empty space? Or what?

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Answer #1

There exists a mathematical space into which our universe is embedded, but it is mathematical because nothing as we know it can get out of the universe or enter the universe.

After the big bang the universe is expanding in three dimensions analogous to the way that the surface of a balloon expands in two dimensions: all points on the balloon surface recede from each other and the surface gets large. The balloon surface is not expanding into anything, as far as the points on the balloon go. In three dimensions all points in our universe recede from each other, having all started from the one point of the big bang.

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