3 ms·
The focal length of the Hubble was certainly different, but maybe other things too... I'd be surprised if this wasn't a copy/paste error, but maybe it really w
by kurthr 8y ago
The focal length of the Hubble was certainly different, but maybe other things too... I'd be surprised if this wasn't a copy/paste error, but maybe it really was some huge miscalculation that nobody caught.
There were a lot of KHs (Keyhole) flying long before Hubble so they didn't have unfixed issues and their test fixtures were all set up (and frankly, probably passed Hubble).
https://en.wikipedia.org/wiki/KH-11_Kennen https://en.wikipedia.org/wiki/KH-11_Kennen
- baldfat 8y agoThe mirror was too flat in the middle and there was a slight wave. It was a mechanical issue when the polished the mirror starting in 1979 for over a year. It wasn't launched till 1990.