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Optics: interference phenomena, exhibited by diffraction gratings. Coloured mezzotint by M. Rapine [1883], after B. Desgoffe. https://www.rawpixel.com/image/13968649/image-background-pattern-circle Free Image from public domain license
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A short course in astronomy and the use of the globes (1871) chromolithograph art by HenryKiddle. Original public domain… https://www.rawpixel.com/image/10184836/image-moon-space-sky Free Image from public domain license
NASA child bubble exploration (2011) illustrated by NASA. Original public domain image from Wikimedia Commons. Digitally… https://www.rawpixel.com/image/10184832/image-galaxy-plant-person Free Image from public domain license
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Campbell Stokes sunshine recorder, which are not in general use anymore, but it's an interesting historical instrument. https://www.rawpixel.com/image/3322346/free-photo-image-morning-science-and-technology-campbell-stoke-sunshine-recorder Free Image from public domain license
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Newly discovered superconductor state opens a window to the evolution of the universe. https://www.rawpixel.com/image/3322341/free-photo-image-science-research-experiment-technology-lab Free Image from public domain license
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MEDITERRANEAN SEA (Oct. 7, 2020) Operations Specialist 2nd Class Wyatt Crump adds to the plan of the day in the combat… https://www.rawpixel.com/image/3393472/free-photo-image-board-cc0-creative-commons Free Image from public domain license
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The newfound planet K2-288Bb, illustrated here, is slightly smaller than Neptune. Located about 226 light-years away, it… https://www.rawpixel.com/image/9975387/image-moon-art-space Free Image from public domain license
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