JB wrote:
You can't convince me that gravity or magnetic fields really require a media
to travel through. Assuming there is one would be a crutch. Didn't stop us
from getting people to the moon and back.

We certainly traveled through the medium of space in
order to get to the moon. EM photons obviously travel
through the medium of space.

What you need to prove is that EM photons can travel
somewhere else besides the medium of space, i.e.
outside of the boundaries of the universe.

(P.S. Since "media" is the plural of "medium",
"a media" is improper.)
--
73, Cecil http://www.w5dxp.com