@SamoBurja thanks for the link. so this assumes 0.1c instead of near-c & uses a reproduction time of 500 y based on http://www.rfreitas.com/Astro/ReproJBISJuly1980.htm …
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@SamoBurja thanks for the link. so this assumes 0.1c instead of near-c & uses a reproduction time of 500 y based on http://www.rfreitas.com/Astro/ReproJBISJuly1980.htm …