Item #001855 Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis. Friedrich Wilhelm BESSEL.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.
Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.

A milestone in the history of astronomical observations

Fundamenta astronomiae pro anno MDCCLV deducta ex observationbibus viri incomparabilis James Bradley in specula astronomica Grenovicensi per annos 1750 - 1762 institutis.

Königsberg: Friedrich Nicolovius, 1818.

1st Edition. Hardcover. Very Good. Item #001855

Folio (326x202 mm). [12], 325 [1] pp. Later half cloth over sprinkled boards (some wear to extemities, corners bumped), paper label to spine, occasional light spotting and browning, title-page with old ink stamps and shelf mark. ---

Houzeau-L. 10117; DSB II, 99 u. 102; Norman 226. - First Edition. "This work also gives the proper motions of the stars, as derived from the observations of Bradley, of Piazzi, and of Bessel himself. It constitutes a milestone in the history of astronomical observations, for until then positions of stars could not be given with comparable accuracy: through Bessel's work, Bradley's observations were made to mark the beginning of modern astrometry" (DSB). --

Bessel's reduction of the English astronomer James Bradley's star position observations for the year 1755 marks the beginning of modern astronomy. Bessel recognized that Bradley's accurate observations could be used to create a reference system for measuring the positions of stars and planets, and to aid in determining accurate positions for the earliest possible epoch. Recognizing that Bradley, although adept at the art of observation, had not been able to evaluate his extensive data, Bessel established the principle that immediately after an observation, the reduction should be made by the observer himself, taking into account precession, nutation, ablation, refraction and instrument error. (Norman 226).

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