[video]
[video]
[video]
You are a photon that was created as a result of nuclear chemistry in a star in that galaxy, 100 million miles away. As a photon, you move at the speed of light, but that’s only in the reference frame of an observer. In your reference frame, speed has no meaning because there’s no distance; length has been contracted to zero. The time that you exist, from your point of view, is zero. Or if you prefer, time has no meaning to a photon, even though its lifetime is well-described by the observer. The distance you covered in your lifetime is 100 million light-years, a distance which you traversed in an instant.
And you traversed this vast distance (or zero distance, depending on reference frame), only to be absorbed by the eyeball of the astronomer who is gazing up into space through a telescope. From the astronomer’s point of view, you’ve been travelling 100 million years, longer than his entire civilization has been around, let alone his telescope, let alone his eyeball. To you, you were created and then instantaneously absorbed into that eyeball.