Advanced Telescopes
The Making of Telescopes and Mirrors
Mirror Making
Large Ground Based Telescopes
The MMT
http://cfa-www.harvard.edu/cfa/oir/FLWO/tour/mmtbefore.html
NASA's "Great Observatories"
Overview from SpaceToday
Hubble Space Telescope
1990 - (2010?)
Compton Gamma Ray Observatory
1991 - 2000
Chandra X-Ray Observatory
1999 -
SIRTF: Space Infrared Telescope Facility
2003? -