Question

What is outside of all universe

Answer 1

Astronomers think space might be infinite, with "stuff" (energy, galaxies, etc.) distributed pretty much the same as it is in the observable universe. If it is, that has some seriously weird implications for what lies out there. Beyondthe Hubble Volume you won't just find more, different planets.

Answer 2

outside the universe their are many galaxies I think so infinite things which we can't imagine