i heard at one point Carl Sagan was approached by some element of the US government about possibly calculating what kind of nuke thet'd have to set off to be vi

i heard at one point Carl Sagan was approached by some element of the US government about possibly calculating what kind of nuke thet'd have to set off to be visible on earth. oh! seems he was a grad student at IIT Chicago and indeed worked on Project A119! i didnt know it was early in his career, or that he'd accepted. https://en.wikipedia.org/wiki/Project_A119#Research https://en.wikipedia.org/wiki/Project_A119#Research