nice try ;-)
The center of the vortex is the center of the vortex.
The universe is mostly made up of fields which we call space.
Nada is a word.
Nothing can't be defined because it does not exist.
The nothing we can define is a concept - a human construct to fill blanks in our knowledge.
;-)
PS Immortality of some kind is mandatory when there is no 'nothing' - our energy must continue, always changing, unable to be destroyed.