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Date: 22 June 1999 Copyright: ESA Show in archive: true
SOHO looks at Comet Hale-Bopp's shadow taken by the SWAN instrument between 25 February, 1997 and 8 March, 1997. The blue-white monochrome images show a portion of the sky illuminated by the Sun's ultraviolet light. The Sun is shown as a round dot at the bottom. The bright white glow at the centre is a 150-million-kilometre-wide hydrogen cloud released by Hale-Bopp's nucleus.