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As near as we can tell, space has no "end" in the conventional sense. This is similar to asking the question "What does the edge of the Earth look like?" The Earth is a sphere, and has no "edge" so you can walk around it forever and never find one.

Consider the Earth. When standing on the Earth it seems flat and two dimensional, but if you point yourself in one direction and keep walking you will always end up back where you started. This is because the surface of the Earth is curved in to a sphere, a third dimension.

Similarly, consider space. It appears to be three dimensional. But space is curved, it appears, in to a fourth dimension!This means that if you hopped in to a space ship, pointed it in to space, and kept going (for a very long time) you would eventually end up back here on Earth!

This is why we say that space has no "end" to it.

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13y ago

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