This absolutely beautiful illustration of a sunset on the Nile was found by one of our volunteers on Science Gossip. It was originally printed in The Intellectual Observer, a 19th century scientific journal. See what historic illustrations you can uncover today at www.sciencegossip.org
Daily Zooniverse 
Is it a picture of an actual sunset? If so, what’s the date (I can guess the location). Red sunsers are sometimes markers of volcanic eruptions (and useful for studies of atmospheric aerosols).