RARE BOOK DIVISION / NEW YORK PUBLIC LIBRARY / SCIENCE PHOTO LIBRARY RARE BOOK DIVISION / NEW YORK PUBLIC LIBRARY / SCIENCE PHOTO LIBRARY
Mare Humorum on the Moon, 19th-century illustration. The Mare Humorum ('sea of moisture') is a lunar mare, a dark basaltic plain on the Moon, formed by ancient volcanic eruptions. In some cases, the basalt flowed into existing impact basins, as here. The impact basin filled by this lunar mare is 425 kilometres across. From a study made in 1875. Artwork by French artist and astronomer Etienne Leopold Trouvelot (1827-1895).
Model release not required. Property release not required.