Space

What is on the other side of the universe? Does the universe stop? Is there a "up" or "down" in space? Does anyone have the answers?

Well our universe is continues to expand and there is no sign of it slowing down. You can check this by measureing the redshift of neibouring Galaxies. Because it is always expanding then I suppose that there is no edge to the Universe, and if you ever went there I'm sure you wouldn't see anything, its just like blowing a balloon up that doesn't burst, it just expands, no light shows no nothing.

trying to walk to the end of the Earth....eventually, you'll just end up right where you started...