Anything that travels at the speed of light doesn't age. It experiences no time passing during its journey. So every photon that hits our retinas or telescope image sensors from a galaxy 12 billion light years away is exactly as "old" as it was when it was created.
They say the light we see from our sun was created in it's core thousands of years ago, but the photons take such a long winding path to leave the suns core and get to it's surface.
🤯
Is there a way to determine lights age?
What happens to light as it ages?
@primary_productions