John Charles Duncan, Photographic studies of Nebulae, Third pape

€65.00

John Charles Duncan, Photographic studies of Nebulae, Third paper,

1923, United States,
Titled & dated,
Book, Very Good,
Book,
25,5  X  17 cm

John Charles Duncan’s (8 February 1882 - 10 September 1967) chief contribution to astronomy was his photographic demonstration of expansion in the Crab nebula. He is perhaps better known, however, as the author of Astronomy, a standard college textbook for over thirty years, which was illustrated with many of his own excellent photographs of nebulae and galaxies.

The Crab nebula, located in the constellation of Taurus, is still today a fruitful subject for investigation because of its association with the pulsar NP 0532; it is believed to be the remnant of a supernova observed in Japan and China in A.D. 1054. By comparing a photograph taken with the sixty-inch telescope at Mount Wilson in 1909 by George Willis Ritchey with one he took himself in 1921 with the same instrument, Duncan was able to demonstrate outward motions in the filaments of the Crab. He later confirmed these motions with another photograph taken in 1938, thus showing that it was indeed an expanding envelope such as has been observed around other novae.

Photo ID: 5850


  • photographic process: Book
  • Vintage photo made by: Mount Wilson Observatory


  • John Charles Duncan, Photographic studies of Nebulae, Third pape
  • John Charles Duncan, Photographic studies of Nebulae, Third pape
  • John Charles Duncan, Photographic studies of Nebulae, Third pape
  • John Charles Duncan, Photographic studies of Nebulae, Third pape
  • John Charles Duncan, Photographic studies of Nebulae, Third pape
  • John Charles Duncan, Photographic studies of Nebulae, Third pape
  • John Charles Duncan, Photographic studies of Nebulae, Third pape

Copyright © 2019
The vintage photos featured on this website are single vintage photographs to be purchased as a collectors item.
No rights for reproduction or commercial use in any form whatsoever are given or implied.
If, when visiting this website, you should encounter photographs that you think you have copyrights or any other rights on, please contact us.
1997-2017 © Copyright AnamorFose, 2, La Bertonnerie, FR-86160 Sommičres-Du-Clain, France, Tel.: +33 (0) 6 49 52 47 54 mail: xavier at anamorfose.be
Powered by Shop Of Shops Template By ZenCart-jQuery.