The Sun (1910) oil painting by Edvard Munch. Original public domain image from Wikimedia Commons. Digitally enhanced by… https://www.rawpixel.com/image/11493475/image-background-art-abstractFree Image from public domain licenseNASA child bubble exploration (2011) illustrated by NASA. Original public domain image from Wikimedia Commons. Digitally… https://www.rawpixel.com/image/10184832/image-galaxy-plant-personFree Image from public domain licenseSun layer diagram (2012) illustrated by NASA. Original public domain image from Wikimedia Commons. Digitally enhanced by… https://www.rawpixel.com/image/10184920/image-space-sky-planetFree Image from public domain license