For example. A star is 8B light years away, we’re told that that the light has taken 8B years to get to us.
BUT the universe is constantly expanding therefor was the star not much much closer to us therefor making it’s light younger?
In: 10
Not sure about something, I reckon what we see when we look at the sky is a composition of “photographs” of wayyyyy back in time, when the stars were younger, and also, expansion *oblige*, when those stars were in a different location, the vast majority of them closer. Okay.
But can we really say the photons coming from them are of a certain age? Photons, travelling at the speed of light, massless (at rest, okay), don’t they live in a state of perpetual present, as if for them the entire universe was going to whizz past them while no time has passed for them? (unless they’re caught in an interaction, let’s think of the lucky ones who travel long distances)
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