what is outside the universe
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idea of the universe says that it is finite but never-ending. To understand this, imagine a telescope with an infinite ability to zoom in, aimed perfectly away from the center of the Earth. If there was no obstruction to get in the way, zooming in far enough in one direction would under this model let you see the other side of the Earth. That’s assuming that the Earth was there some 50 billion years ago when the light would have left to enter your telescope, which is unlikely since that’s several times the current age of the universe.
The point of the thought experiment is to impress the idea of a universe that is curved around a fourth dimension we cannot directly perceive. In this conception there is nothing outside the universe because there is no edge to be beyond — at least, not one that can be intrinsically grokked by the human mind.
Even if we confine ourselves to the idea that the currently observable universe is simply the area over which matter from the Big Bang has thus far traveled, we come up against a problem: what is this matter expanding into? Under this conception of the question, we must grapple with the idea that the universe doesn’t necessarily need anything to expand into. Space itself has been famously defined as “No more and no less than what is measured by a ruler.” In other words, though we tend to talk about space-time as a substance like a rubber sheet, it is not a thing that has physical reality. It is therefor perfectly possible that beyond the universe of matter there is quite simply nothing. But who’s to say that the nothing isn’t part of the universe, too?
The point of the thought experiment is to impress the idea of a universe that is curved around a fourth dimension we cannot directly perceive. In this conception there is nothing outside the universe because there is no edge to be beyond — at least, not one that can be intrinsically grokked by the human mind.
Even if we confine ourselves to the idea that the currently observable universe is simply the area over which matter from the Big Bang has thus far traveled, we come up against a problem: what is this matter expanding into? Under this conception of the question, we must grapple with the idea that the universe doesn’t necessarily need anything to expand into. Space itself has been famously defined as “No more and no less than what is measured by a ruler.” In other words, though we tend to talk about space-time as a substance like a rubber sheet, it is not a thing that has physical reality. It is therefor perfectly possible that beyond the universe of matter there is quite simply nothing. But who’s to say that the nothing isn’t part of the universe, too?
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black space after our universe
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