Quote:
Originally posted by mike4947
and don't forget, that billions of light years also means billions of years ago. It'll be billions of years before what's happening there now get to us.
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another good and unfathomable factazoid.
while i have you here mikey........here's one i've always wondered about that pertains to your comment.
let's say a ray of light from a star, about 1 million years ago, streams through the universe to reach the lens of your or my eyes.
let's say that once it has travelled and that light has reached our vision, why does it continue to shine?
i figure that 1 million years ago, (the point in the past in which this star actually resides) the star might actually be burnt out, by the time it took for that one ray to reach us, 1 million light years (in the future).
do you get what i'm saying?????
how many times does the rays from this star actually travel that 1 million light years. and why do we still continue to see it.
say like the constellations.
will they eventually cease to shine in the sky.
or does this "ray", from head to tail, sort to speak, span the entire distance of 1 million years, and we continue to see that entire ray.
is the ray actually, 1 million light years in length, as well?