Drawings of Mars showing its 'canals' and polar ice caps from observations made at Lowell Observatory, Flagstaff, Arizona, USA 1907 July 8-12.

Size: 6000px × 2889px
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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1907, 8-12., america, archival, archive, arizona, astronomy, canals, caps, drawings, flagstaff, historical, history, ice, july, lowell, mars, observations, observatory, planetary, polar, science, scientist, showing, usa