19th century astronomical drawings compared to NASA photos

French artist and astronomer E. L. Trouvelot created 7000 sketches of astronomical observations at Harvard College's observatory where he worked. He also created 15 large pastel drawings of celestial bodies as viewed through the 'modern' telescopes of the 19th century. How precise were they? Lauren Weiss of the New York Public Library compared the drawings with  NASA photographs taken about 150 years later.

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Via Boing Boing