**Erasmus Reinhold** (October 22, 1511 – February 19, 1553) was a German
astronomer and mathematician, considered to be the most influential
astronomical pedagogue of his generation.[2] He was born and died in
Saalfeld, Saxony.
He was educated, under Jacob Milich, at the University of Wittenberg,
where he was first elected dean and later became rector. In 1536 he
was appointed professor of higher mathematics by Philipp Melanchthon.
In contrast to the limited modern definition, "mathematics" at the
time also included applied mathematics, especially astronomy. His
colleague, Georg Joachim Rheticus, also studied at Wittenberg and was
appointed professor of lower mathematics in 1536.
Reinhold catalogued a large number of stars. His publications on
astronomy include a commentary (1542, 1553) on Georg Purbach's
Theoricae novae planetarum. Reinhold knew about Copernicus and his
heliocentric ideas prior to the publication of De revolutionibis and
made a favourable reference to him in his commentary on Purbach.[3]
However, Reinhold (like other astronomers before Kepler and Galileo)
translated Copernicus' mathematical methods back into a geocentric
system, rejecting heliocentric cosmology on physical and theological
grounds.[4]
Duke Albert of Brandenburg Prussia supported Reinhold and financed the
printing of Reinhold's
**Prutenicae Tabulae**

Prutenicae Tabulae or Prussian Tables. These
astronomical tables helped to disseminate calculation methods of
Copernicus throughout the Empire, however, Gingerich notes that they
showed a "notable lack of commitment" to heliocentricity and were
"carefully framed" to be independent of the movement of the Earth.[5]
Both Reinhold's
**Prutenic Tables**

Prutenic Tables and Copernicus' studies were the
foundation for the
**Calendar Reform**

Calendar Reform by
**Pope Gregory XIII**

Pope Gregory XIII in 1582.
It was Reinhold's heavily annotated copy of De revolutionibus in the
Royal Observatory, Edinburgh, that started
**Owen Gingerich**

Owen Gingerich on his
search for copies of the first and second editions which he describes
in The Book Nobody Read.[6] In Reinhold's unpublished commentary on De
revolutionibus, he calculated the distance from the Earth to the sun.
He "massaged" his calculation method in order to arrive at an answer
close to that of Ptolemy.[7]
His name has been given to a prominent lunar impact crater that lies
to the south-southwest of the crater Copernicus, on the Mare
Insularum.
References[edit]

^ *NDSU Department of
**Mathematics**

Mathematics (1997). "
**Mathematics**

Mathematics Genealogy
Project".
**Mathematics**

Mathematics Genealogy Project. American Mathematical
Society. Retrieved 5 April 2016.
^ Owen Gingerich: The Role of
**Erasmus Reinhold** and the Prutenic Tables
in the Dissemination of the Copernican Theory, 1973, Studia
Copernicana, Poland [1]
^ Owen Gingerich, The Book Nobody Read (Heinman, 2004, p. 19)
^ Hanne Andersen, Peter Barker, and Xiang Chen. The Cognitive
Structure of Scientific Revolutions. New York: Cambridge University
Press, 2006. pp 138-148
^ Owen Gingerich, From Copernicus to Kepler (Proceedings of the
American Philosophical Society, 1973)
^ Owen Gingerich, The Book Nobody Read (Heinman, 2004, p. 25)
^ Richard Kremer, Book review of On the distances between the sun,
moon and earth [2]

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WorldCat Identities
VIAF: 15570296
LCCN: n85827509
ISNI: 0000 0001 1021 7068
GND: 11899901X
SELIBR: 248161
SUDOC: 08682810X
MGP: 126736
SN