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And here it is. A Hubble image of Mars and a 19th Century drawing, both with south at the top. Astronomers had observed a roughly circular marking with a central dark spot. Schiaparelli made it the place where Helios would begin his journey over the planet, distributing names as he went. He named it Solis Lacus, the Lake of the Sun. The modern feature Solis Planum is inside it. #maps#Mars#Shiaparelli
