An artist’s impression of GRO J1655-40 (1999 and 2001) illustrated photo by NASA/CXC/A.Hobart. Original public domain image from Wikimedia Commons. Digitally enhanced by rawpixel.
Christmas Nebula by Ekaterina Valinakova
Lightning Struck a Flock of Witches, William Holbrook Beard. Original public domain image from Smithsonian.
Reaching for the moon (1933) chromolithograph by Edward Mason Eggleston. Original public domain image from Wikipedia. Digitally enhanced by rawpixel.
NASA Astronaut Stands on Mars (2020) illustrated by NASA/JPL-Caltech. Original public domain image from Wikimedia Commons. Digitally enhanced by rawpixel.