61 Cygni

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Sources

1. ArticleA letter from Professor Bessel to Sir J. Herschel, Bart., dated Königsberg, Oct. 23, 1838

observed by:

• Friedrich Wilhelm Besselsince 1838

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

Appears in1 item

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  Telescopes: Galileo to JWST1 item
  • Bessel measures the distance to a star1838