Optical photograph of Halley's Comet

Bildnummer 11883613
Optical photograph of Halley's Comet
Optical photograph of Halley's comet taken on 9 April,1986,the night before the comet's closest approach to Earth. Named after Edmund Halley (1656-1742),who first recognised its periodicity,the comet has been recorded every 76 years since 240 BC. It consists of a potato- shaped nucleus of ice & dust. Its tail is formed as the comet is heated when it approaches the Sun. Dust & gas are released and swept into a tail both by radiation pressure and by the solar wind. The photo is a one hour exposure which tracked the moving comet,and shows background star trails
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / NOAO
Bildgröße: 5197 px × 3539 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
Restrictions:
  • This image may not be used to state or imply NOAO endorsement of any company or product

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