If outer space is bounded, what is outside outer space?

You should not ask this question on Quora. You should not ask this question on Reddit. You should not ask this question on Yahoo! Answers. We can see as far as the CMB and each day, what we can see extends one light-day further. read more

Nothing is outside of outer space. Space is expanding into nonexistence. Space itself is not “nothing”. It has lenght, width, height, and duration (four primary dimensions) plus other dimensions which we can mathematically describe in physics but not detect in the universe. read more

Outside of Outer Space If by outer space you mean all that surrounds the Earth and stretches into all directions as far as people can see, then you're talking about what astrophysicists call the universe. read more

Outer space, or just space, is the expanse that exists beyond the Earth and between celestial bodies. Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays. read more

If by outer space you mean all that surrounds the Earth and stretches into all directions as far as people can see, then you're talking about what astrophysicists call the universe. read more

Outer space, or just space, is the void that exists between celestial bodies, including Earth.[1] It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays. read more