The Strolling Astronomer, 1961 (1-2) Drawing, made with a 10-inch reflector, 1960. Source   Chapman’s 1960-61 map of Mars.  Photo source “The map of Mars was constructed by Clark R. Chapman and based on 60 of his drawings during the 1960-61 apparition of Mars. The drawings were made primarily with his 10-inch reflector between […]

1954 Association of Lunar and Planetary Observers (A.L.P.O.) 1954 Source   1960 Both, Ernst E., A.L.P.O. Map of Mars for 1960-1961   These maps are updated regularly. See http://www.alpo-astronomy.org/jbeish/Observing_Mars_4.html

1890 Giovanni Giovannozzi Personal letter to Schiaparelli Oct 8, 1890, Item CCXXX in Corrispondenza su Marte di GV Schiaparelli, Vol II, Pisa Domus Galileana, 1976

Authors: Raymond Ghirardi, Xavier Pasco, Isabelle Surbès Verger   Editions Atlas de géographie de l’espace 1997, 1999 L’espace, nouveau territoire Atlas des satellites et des politiques spatiales. Belin, 2002 The Cambridge Encyclopedia of Space: Missions, Applications and Exploration. Cambridge University Press, 2003

Authors: MM. C. Luplau-Janssen and E. Buch-Andersen Observatory of Copenhagen. Source: Camille Flammarion Annuaire Astronomique pour 1913. (vol 49). Paris, Librarie Ernest Flammarion.   Courtesy of I. Almar

Drawn by: Edward Walter Maunder Evans, J. E. & Maunder, E. W.: Experiments as to the actuality of the “Canals” observed on Mars. Monthly Notices of the Royal Astronomical Society, Vol. 63, p.488-499. June 1903 This experiment was to test the real existence of canals on Mars. “Drawing 6*25 inches based upon one by Professor Schiaparelli made […]