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For Hubble, I'm assuming you're meaning the lens sag issue because they forgot to account for gravity bending the lens while it was sitting on Earth pre-launch? |
#2
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The Hubble problem was idiotic stupid pigheaded project leaders. There were two different test devices used to measure it. One, the simpler one, correctly said that it was exactly as it was: very very wrong. The more complicated, expensive one, was simply wrong. No one ever checked either test device. No one did a trivial by-eye test that would have verified which was right, for two reasons: 1) that doing so required a human to climb a scaffold and that was deemed both too dangerous and too expensive (building the scaffold, the by-eye test apparatus was free ... several workers personally owned one, as do I). 2) the idiots said that the by-eye test was not sensitive enough to detect any possible error. That was, however, assuming that their already-decided idea that the complicated tester was right was indeed correct: they knew that the by-eye test would be sensitive enough to tell which tester was correct. |
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