Not that I'm in this RP or anything, but since I'm lurking here anyway, I thought I'd add a little to the photon discussion:
[url=https://www.spaceanswers.com/deep-space/if-photons-of-light-have-no-mass-how-can-space-be-bent-by-gravity/]short version[/url]
[url=https://www.physicsforums.com/threads/do-photons-have-mass.138395/]physics forum discussion about whether photons have mass or not[/url]