Astronomy without a telescope (1869) illustrated by Colbert, E(lias). Original public domain image from Wikimedia Commons.… https://www.rawpixel.com/image/10184748/image-space-pattern-skyFree Image from public domain licenseNASA Astronaut Stands on Mars (2020) illustrated by NASA/JPL-Caltech. Original public domain image from Wikimedia Commons.… https://www.rawpixel.com/image/10184729/image-astronaut-sunset-personFree Image from public domain licenseJPL Visions of the Future, Mars (2018) illustrated by Jet Propulsion Laboratory (JPL) / NASA. Original public domain image… https://www.rawpixel.com/image/10184944/image-art-space-cartoonFree Image from public domain licenseJPL Visions of the Future, Europa (2016) illustrated by Jet Propulsion Laboratory (JPL) / NASA. Original public domain image… https://www.rawpixel.com/image/10184894/image-people-moon-spaceFree Image from public domain licenseThe Artificial or Oblique Armillary Sphere (1740) engraving art by Nicolas de Fer. 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