Image-processed optical photograph of the head of Halley's Comet, derived from 4 exposures made on May 25, 1910, at Helwan, Egypt. Successive colour c

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Image-processed optical photograph of the head of Halley's Comet, derived from 4 exposures made on May 25, 1910, at Helwan, Egypt. Successive colour contours, from green (less intense) through to blue (intense), represent increasing brightness of the comet's nucleus. The computer enhancement reveals a small jet extending to the left from the centre of the nucleus.

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Size: 4169px × 4205px
Photo credit: © NASA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1910, astronomy, comet, cometary, cosmology, halley, halleys, image, optical, processing, science