If the Universe Expands, What Is It Expanding Into?

If the Universe Expands, What Is It Expanding Into? | Space Documentary 2024


As unfathomably large as the universe already is, we keep hearing from scientists that the universe is actually expanding. But what exactly does that mean? When we think of expansion, we might picture objects moving apart in space, but in this case, it's the space itself that's stretching. Galaxies are moving away from each other, not because they are traveling through space, but because the fabric of space between them is growing. If the universe really is expanding, what is it expanding into? Is there something beyond the universe, or is space itself infinite? Join me as we find the answers.