Designed and 3d printed this 8“ Dobsonian reflector! More info in comments : r/3Dprinting
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Designed and 3d printed this 8“ Dobsonian reflector! More info in comments : r/3Dprinting
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Histoire du télescope de Newton à nos jours - L'Esprit Sorcier
Encyclopædia Britannica, Ninth Edition/Telescope - Wikisource, the free online library
Opticks: or, a Treatise of the Reflections, Refractions, Infections and Colours of Light. The Fourth Edition, corrected. by NEWTON, Isaac (1643-1727) - 1730