Astronomy: an astronomer [] in his study, reading by the light of a powerful lamp, wearing a pair of spectacles. Woodcut. https://www.rawpixel.com/image/14014714/image-paper-face-personFree Image from public domain licenseFree Baltimore oriole bird standing on tree branch image, public domain animal CC0 photo. https://www.rawpixel.com/image/5906383/photo-image-background-public-domain-treeFree Image from public domain licensePortrait of a young girl dressed in dark clothes, wearing dark gloves https://www.rawpixel.com/image/14284273/portrait-young-girl-dressed-dark-clothes-wearing-dark-glovesFree Image from public domain licenseSpeech by President of Ukraine Volodymyr Zelenskyy in the Knesset. March 20, 2022 https://www.rawpixel.com/image/6918266/photo-image-public-domain-laptop-personFree Image from public domain licenseFree Ficus Branch leaf image, public domain plant CC0 photo. https://www.rawpixel.com/image/5925823/photo-image-public-domain-leaf-plantView licenseFireworks, New Year, celebration. Free public domain CC0 photo. https://www.rawpixel.com/image/6038059/photo-image-new-year-public-domain-celebrationFree Image from public domain licenseCherry Blossoms around the Tidal Basin, with the Washington Monument in the background https://www.rawpixel.com/image/9067178/photo-image-background-flowers-artFree Image from public domain licenseFree Superstar Aquarius ship, Taiwan photo, public domain criuse CC0 image. https://www.rawpixel.com/image/5925758/photo-image-public-domain-ocean-seaView licenseFree labrador retriever puppy image, public domain animal CC0 photo. https://www.rawpixel.com/image/5906549/photo-image-background-public-domain-greenFree Image from public domain licenseA green-eyed tabby on wood logs creeping towards the camera. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3296596/free-photo-image-cat-abyssinian-animalFree Image from public domain licenseControl Room Panels with Operators, Oak Ridge, Y-12. Original public domain image from Flickr https://www.rawpixel.com/image/3325579/free-photo-image-art-cc0-corridorFree Image from public domain licenseFree Iguana image, public domain reptile CC0 photo. https://www.rawpixel.com/image/5920103/photo-image-background-public-domain-natureView licenseBunch of yellow flowers https://www.rawpixel.com/image/5939865/bunch-yellow-flowersView licenseFree close up guinea pig's fur image, public domain animal CC0 photo. https://www.rawpixel.com/image/5918913/photo-image-background-textures-public-domainFree Image from public domain licenseFree 2 polar bears walking together image, public domain animal CC0 photo. https://www.rawpixel.com/image/5908222/image-background-public-domain-natureFree Image from public domain license