26" Thompson Refracting Telescope - Dome E
20:52
YERKES OBSERVATORY TOUR 2021 - World's Largest Refracting Telescope!
11:45
7” APO Vs 12” SCT Telescope on the PLANETS – When aperture does not matter???
16:27
The Worlds Biggest Telescopes Through History - From Galileo to Gran Telescopio Canarias
14:23
Restoring Lowell Observatory's Clark Refractor
3:04
Yerkes Observatory | Operating the World’s Largest Refracting Telescope
6:57
Portable astronomical dome construction
19:42
Why is this Space Telescope so Tiny?
12:48