If speed of PHOT is speed of light then...
PHOT speed = 3px/frame = 180 px/sec = 299792458 m/s
so 180 px = 299792458m or 1px is roughly 1666 km.
The scale is better suited for things like moon systems.
Curious question. I thinked the same question before lol
The scale is as vast as space and as timeless as infinity.