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

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

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

File:Scientific dialogues; intended for the instruction & entertainment of young people (IA scientificdialog00joyc 0).pdf

Of the Elasticity of Air . VIII. Of the Compression of Air . j^rj jyj jpg jpg jpjj-j ]V4 IX. Miscellaneous Experiments on the Air-pump. jyp CONTENTS

File:The Intellectual observer. Volume 1, February - July 1862. (IA s830id13378920).pdf

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File:Rear of Primary Mirror of Keck Telescope.jpg

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