Can anything be said to exist "outside of" or independent of Time/Space, and if so how and why?

IMAGINE GETTING IN A SPACESHIP and never reaching the end,but if you travelled through all that empty space observing planets and came to the end of space,what is on the other side?nothing?empty space,but that is something, is it endless,what if space was spherical and you travelled in a circle,like earth,then whats on the other side of the sphere?empty space?,SO HOW CAN the darwins of the world come up with a theory when we don't anything about what's happening 1000000000000000000000000000000000000000… trillion miles away