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This image was taken on October 17, 1924, and shows the moons of Mars - Phobos and Demios.
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Telescope photograph taken July, 19, 1928.
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Drawing of Mars, circa 1929.
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Mars drawing by astronomer E. C. Silpher.
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Mars drawing by astronomer E. C. Silpher.
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Mars drawing published in the Standard Dictionary of the English Language, 1931.
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Drawing by Percival Lowell showing "canals".
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Map of Mars, early 1900s.
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Early 1900s drawing of Mars, by Robert Stawell Ball.
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Early 1900s drawing of Mars, by Robert Stawell Ball.
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