Quote:
Originally Posted by Terry B
I wonder what they were made for. They must have been a cancelled order research scopes. ?why
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NASA and the NSF, had a few mirrors that never went into service, apparently? My understanding is that there were back up mirrors for some missions, at NASA. I read, in a recent Sky & Telescope mag, that NASA donated two mirrors, intended for spy satellites (?), to some organisation in the US. I can't remember the details though. I would have to look it up.