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Is there any speculation or theory on why c=300,000 km/sec(approx) and not some other value, like, 150,000 km/sec or 600,000 km/sec? What determines this cosmic speed limit anyway?
The age of the universe is about 14 by. The farthest distance that astronomers have detected galaxies is about 14 bly. Is there any explanation for this numerical coincidence? Just wondering.
so when we look at something that is 14 billion light years away, we are looking at light that was emitted 14 billion years ago
Quoteso when we look at something that is 14 billion light years away, we are looking at light that was emitted 14 billion years ago Hi George Sorry but for above to be correct we would have to reside in a static universe. A photon released from a star in a galaxy that was say 10 billion light years away from us 10 billion years ago would take more than 10 billions years to reach us because the space in between us and the star would have dramatically increased over 10 billion years especialy as recession velocities can exceed c.The way i see it and tell me if i'm wrong but its possible that their is light released by some stars that were only 5 billion light years away from us a few billion ly ago that has never and will never reach our planet if the expansion of the universe continues on its present path.. And therefore the limit to how far we can see is not the age of the universe but must be the speed of expansion.
I would add to the above, all interesting issues, the following:Are we sure that space is expanding?
lightarrow: Rotating with respect to what? Since the universe is "everything" it can only rotate with respect to "nothing", therefore it isn't rotating.