File:Liquid Mirror Telescope.jpg

DescriptionLiquid Mirror Telescope.jpg English: The Liquid Mirror Telescope, operated by the NASA Orbital Debris Program Office at the NASA Orbital Debris

DescriptionMaking the Invisible Visible- A History of the Spitzer Infrared Telescope Facility (1971–2003) - NASA Monographs in Aerospace History, No. 47 (2017)

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DescriptionRear of Primary Mirror of Keck Telescope.jpg This is the rear of the primary mirror assembly. I believe the black tube in the foreground contains