It cant be nothing— our planet earth sits in a galaxy, the galaxy sits in the known universe— well, whats the known universe setting in? then what that setting in, and so forth?
But, there is NO THING.....nothing. What is logic made of? What is love made of? What is the physical makeup of consciounsess, or the number 3, or any abstract entity? Nothing...that is the physical makeup of that beyond the time/space barrier. It is, I will agree, a very difficult concept....but that is it.