Speed of light vs time - Relativity

Originally posted by StarValleyWy
I have to leave, so I thought I better leave an answer to my poser.
The correct answer to how long it takes a photon to cross the universe is "Who Knows?" Literally. Since time does not exist AT THE SPEED OF LIGHT, what is anything divided by zero? It is undefined.

I thought you meant the question from an inertial observer frame of reference.