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Greetings! And a question/clarification/food for thought.
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Quote:Indeed. But I guess that precise motion of stars is know very well to compensate.
This can be calculated, yes. But there are always uncertainties, which increase with distance and time. Since some of these uncertainties are caused by events outside the observer's light cone, these unknown unknowns can only be estimated.
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RE: Greetings! And a question/clarification/food for thought. - by stevebowers - 09-04-2020, 09:43 PM

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