I can’t comprehend the vastness of space, to me, there has to be an end out there like the walls of a box.
If you haven't read "Flatland," grab a copy online and check it out.
The point being, that although we can't picture it, it may be possible to have a finite volume that doesn't end like the walls of a box (or sphere).
Earth has a finite area, but no edge in 2-d.
Even then, the volume of the universe is mind boggling - and so is the emptiness - and so is the physical violence! Collisions, fusion, heat, velocities, energy releases that are so far beyond our earth-bound experience, that they defy comprehension. Even though mother nature is pretty tough, the surface of the earth is a very peaceful corner of the universe.
“I can’t comprehend the vastness of space, to me, there has to be an end out there like the walls of a box.”
Yes, and what is crazy is that they say that space it self is expanding like a balloon, getting bigger and bigger until some day everything is so cold that there will be no energy for anything to move.
But, that is just our universe. Some of these guys think that there are millions of universes that are constantly bubbling up from a constant big bang. Some of these over lap with ours without us realizing it. So it looks like a bath tub with bubbles, each its own universe.
That is cool to my thinking because it sounds like what Christians have always said — that this world is passing away, that there is a better place we are going. Think the many worlds of CS Lewis’s Narnia stories.