Friedrich Wilhelm Bessel

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Sources

1. ArticleA letter from Professor Bessel to Sir J. Herschel, Bart., dated Königsberg, Oct. 23, 1838
2. BookThe History of the Telescope

observed:

• 61 Cygnisince 1838

  Sources: A letter from Professor Bessel to Sir J. Herschel, Bart., dated Königsberg, Oct. 23, 1838

Appears in1 item

• 
  Telescopes: Galileo to JWST1 item
  • Bessel measures the distance to a star · measurer1838