Unfinished Business: William Herschel's Sweeps for Nebulae

  title={Unfinished Business: William Herschel's Sweeps for Nebulae},
  author={Michael A. Hoskin},
  journal={History of Science},
  pages={305 - 320}
  • M. Hoskin
  • Published 1 September 2005
  • Physics
  • History of Science
Nearly all the objects we see in the night sky are planets or stars, well-defined sources of light, but even a modest telescope reveals a number of hazy patches or 'nebulae'; of these a very few, and notably the great nebula in the constellation of Orion, can be glimpsed with the naked eye. In 1715 Edmond Halley published in Philosophical transactions a short paper listing six nebulae.' and as the century wore on the number of known nebulae steadily increased. Philippe Loys de Cheseaux (1718-51… 
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