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On 4/11/2024 10:45 PM, Thomas Heger wrote:To measure the position of a star in one billion light years distance
you need to wait a billion years, before you can actually see the light
emitted from that star.
Because that is impossible, we simply don't know to were those stars
went in the meantime.
Think of taking a look at a star A that is say, 100 light years from
Earth. Now, look at some other stars around it and try to create a
little map. Okay, now jump to the star A right now. Well, that star is
most likely to be in a radically different place, or even dead via
supernova we have had a chance to detect yet. The map is going to be
meaningless.
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