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Olaf Pedersen

Olaf Pedersen is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Olaf Pedersen rather than just read about it. In short: Olaf Pedersen (8 April 1920 – 3 December 1997) was a Danish historian of science who was "leading authority on astronomy in classical antiquity and the Latin middle ages." Pedersen was active in the journal Centaurus, the Steno Museum, the International Union of History and Philosophy of Science, and the International Academy of the History of Science. Biography Olaf Pedersen was born in Egtved, Jutland, Denmark.

Key takeaways

  • Olaf Pedersen belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Olaf Pedersen to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Olaf Pedersen from memory before moving on to harder problems.

Reference excerpt

Olaf Pedersen (8 April 1920 – 3 December 1997) was a Danish historian of science who was "leading authority on astronomy in classical antiquity and the Latin middle ages." Pedersen was active in the journal Centaurus, the Steno Museum, the International Union of History and Philosophy of Science, and the International Academy of the History of Science.

Biography Olaf Pedersen was born in Egtved, Jutland, Denmark. At the University of Copenhagen he studied in Niels Bohr’s institute, graduating in 1943 when the country was occupied by German forces. He began his teaching career in Randers, Jutland, teaching physics. He entered scholarship studying the philosophy and history of ideas. After the war he studied with Etienne Gilson in Paris. Returning to Denmark, he obtained a doctorate for work on Nicole Oresme in 1956, when he became a lecturer at Aarhus University. In 1965 a department for history of science was formed at Aarhus. "The staff of the department, including Pedersen, taught science as well as history of science, and though this diluted their research it kept them in contact with science and maintained their bona fides among science colleagues." In 1967 Pedersen became a professor in this department. After an operation on his heart, Olaf Pedersen died December 3, 1997.

Works

Oresme In 1956 the Munksgaard publishing house issued a 290 page volume for Acta historica scientariarum naturalium et medicinalium (volume #13) on Nicole Oresme: Nicole Oresme og hans naturfilosofiske system: en undersogelse af hans skrift "Le livre du ciel et du monde".

Early Physics and Astronomy In 1974 Pedersen collaborated with Pihl Mogens to write Early Physics and Astronomy: A Historical Introduction where they speculated about a Latin translation of Ptolemy's Almagest by Boethius that has been lost: "Had it been preserved, Latin astronomy would not have been compelled to start with a delay of more than 700 years." (page 188) Reviewer George Saliba commented, "One would prefer that such statements were not written, for they reflect on a vision of history that makes the development of science depend on such haphazard accidents,..." Pedersen also published An Survey of the Almagest (1974).

The First Universities Pedersen described his take on the history of European universities in The First Universities (1997), which received several scholarly reviews: A favorable review was given by DR Jones: [Pedersen] "develops a complex explanation of the nature of the university, if not a theory of causation. His first universities are shaped by interweaving requirements of subject matter, teaching methods, legal and organizational means, and requirements of society and state." Ian P. Wei gave the book an enthusiastic review, calling it a "clear and lively work of synthesis." He wrote that the "main thrust of the book is to present medieval universities as institutions which can only be understood in relation to broader political and social developments. Particular emphasis is laid on the significance of the struggles between popes and emperors, and on Roman law. The book’s greatest strength is its extraordinary breadth of vision." On the other hand, Ruth Karras wrote, "this book begins, not as a history of universities, but as a history of learning." Her opinion was that a "more balanced view for both medievalists and non-specialists" was provided by volume one of A History of the University in Europe (1992), edited by Hilde Ridder-Symoens. Marcia L. Colish described the book as "a superficial and shaky sketch of what universities actually taught. He emphasizes the organization, not the content of education." Colish finds Pedersen prone to "repeat and compound factual errors more recently given the decent burial they deserve." She suggests other, more reliable, authorities. A balanced review was given by H. E. J. Cowdrey: "Perhaps the most valuable chapters of the book are those which concern the classical inheritance of medieval higher education and the transition from ancient science to monistic learning." On the other hand, Cowdrey notes a "disconcerting number of factual errors", "too much attention is given to relatively unimportant topics", and "very little account indeed has been taken of scholarly work published since the early 1970s."

Articles 1963: "The 'Philomaths' of 19th-century England", Centaurus 8(1) 1963: "Master John Perks and his Mechanical Curves", Centaurus 8(1) 1969: "Sagredo's Optical Researches", Centaurus 13(2) 1985: (with Bjarne Hulden and Kate Larsen) "Aage Gerhardt Drachmann (1891 to 1980): a bibliography", Centaurus 28(2)

Notes

Further reading Olaf Pedersen (1992) The Book of Nature, Vatican Observatory Publications ISBN 0-268-00690-3, distributed by University of Notre Dame Press.

Worked examples

Example 1 — a first encounter with Olaf Pedersen

Start with the simplest possible case. Write down what Olaf Pedersen claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Olaf Pedersen before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Olaf Pedersen ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Olaf Pedersen

In research
Olaf Pedersen appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Olaf Pedersen in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Olaf Pedersen is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1920 births, 1997 deaths, 20th-century Danish historians, so understanding it makes those chapters shorter.
In everyday life
Look for Olaf Pedersen outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Olaf Pedersen in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Olaf Pedersen means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Olaf Pedersen out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Olaf Pedersen in simple terms?

Olaf Pedersen (8 April 1920 – 3 December 1997) was a Danish historian of science who was "leading authority on astronomy in classical antiquity and the Latin middle ages." Pedersen was active in the journal Centaurus, the Steno Museum, the International Union of History and Philosophy of Science, a…

Why does Olaf Pedersen matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Olaf Pedersen?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Olaf Pedersen.

Tags

  • 1920 births
  • 1997 deaths
  • 20th-century Danish historians
  • 20th-century science writers
  • Academic staff of Aarhus University
  • Danish historians of science
  • Historians of science
  • People from Vejle Municipality

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