It was great show.  It's pretty difficult to cover 400 years of technological development without skipping over something.  IMHO, the only thing I would like to have seen was acknowledgement of the contributions of Joseph Franhaufer.  In their rush to get from Newton's first 1 inch reflector demonstration telescope to the Keck,  the _400 years_ writers made a brief stop in the 1880s and the birth of astrophotography.  Franhaufer's contribution to another major theme in modern telescopic astronomy was his devotion to the creation of instruments of ever greater high-precision instruments with systematic improvement to materials.  Astronomy and astrometry pretty much calcified after the Herschels due to the inability of telescope makers to build high-precision instruments until Franhaufer turned telescope design and manufacturing into a science.  Today's segmented, multi-mirror gaint scopes with shape adjusting acutators controlled by active optics owe their roots as much to Fraunhaufer world-view as to Issac Newton.  - Clear Skies - Kurt