ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Total solar eclipse observation, 1869. Engraving of astronomers observing the 1869 total solar eclipse. Two men are seen changing a photographic plate in the largest telescope (left). This Canadian team observed a total solar eclipse from Jefferson City in Iowa, USA. They made an early use of astronomical photography and spectroscopy, and proved that the corona originates in the Sun.
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