Internal view of the O'Neill cylinder (2015) painting by Don Davis. Original public domain image from Wikimedia Commons.… https://www.rawpixel.com/image/10184805/image-cloud-sunsets-shadowFree Image from public domain licenseA long elevated road along the seashore. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3336865/free-photo-image-background-phone-wallpaper-australiaFree Image from public domain licensePacific Coast Sunset at Monterey, California. Original image from Carol M. Highsmith’s America, Library of Congress… https://www.rawpixel.com/image/434134/monterey-californiaFree 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 licenseMountain-sunset view from Telluride, once a mining boomtown and now a popular skiing destination in Colorado. Original image… https://www.rawpixel.com/image/434426/mountain-sunset-viewFree Image from public domain licenseCamel desert background, travel illustration. Free public domain CC0 image. https://www.rawpixel.com/image/6479987/image-background-frame-public-domainFree Image from public domain licenseThe setting sun paints the clouds over NASA's Kennedy Space Center in Florida. Original from NASA. Digitally enhanced by… https://www.rawpixel.com/image/440893/setting-sunFree Image from public domain licenseA sparkling burning firework. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284877/free-photo-image-spark-fireworks-nightFree Image from public domain licenseSydney, Australia. 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Digitally enhanced by rawpixel. https://www.rawpixel.com/image/440480/earth-observationFree Image from public domain licenseRed berries on bare tree branches that are covered in frost by the Vuoksi River. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3286023/free-photo-image-christmas-tree-winter-snowFree Image from public domain licenseBrooklyn Bridge, New York City, United States. 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Highsmith’s America, Library of Congress collection.… https://www.rawpixel.com/image/434173/avila-beach-pierFree Image from public domain licenseFree woman doing yoga pose by the beach image, public domain sport CC0 photo. https://www.rawpixel.com/image/5912948/photo-image-light-public-domain-natureFree Image from public domain licenseSunset on the savannah, oil painting. Original public domain image by Akseli Gallen-Kallela from Finnish National Gallery.… https://www.rawpixel.com/image/8689378/image-art-tree-skyFree Image from public domain licenseNewport Reflections. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3285996/free-photo-image-sunset-bridge-imagesFree Image from public domain licenseFree view of Westminster bridge and Big Ben in London image, public domain CC0 photo. https://www.rawpixel.com/image/5924003/photo-image-background-public-domain-skyFree Image from public domain licensePanoramic view of grassland and mountains, free public domain CC0 photo https://www.rawpixel.com/image/5921398/photo-image-public-domain-trees-natureFree Image from public domain licenseFree airplane flying during sunset image, public domain aircraft CC0 photo. https://www.rawpixel.com/image/5919507/photo-image-background-clouds-lightFree Image from public domain licenseWind turbines above San Gorgonio Pass, known as Banning Pass, in Riverside County. Original image from Carol M.… https://www.rawpixel.com/image/421948/wind-turbinesFree Image from public domain license