astronomy

Johann Hermann

Johann Hermann 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 Johann Hermann rather than just read about it. In short: Johann, or Jean-Frederic, Hermann, or Herrmann, (31 December 1738 in Barr, Alsace – 4 October 1800 in Strasbourg) was a French physician and naturalist. In 1769 he was appointed professor of medicine at the School of Public Health of Strasbourg, then, in 1778, professor of philosophy, before going on, in 1784, to succeed Jacob Reinbold Spielmann as chair of chemistry, natural history and materia medica.

Key takeaways

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

Reference excerpt

Johann, or Jean-Frederic, Hermann, or Herrmann, (31 December 1738 in Barr, Alsace – 4 October 1800 in Strasbourg) was a French physician and naturalist. In 1769 he was appointed professor of medicine at the School of Public Health of Strasbourg, then, in 1778, professor of philosophy, before going on, in 1784, to succeed Jacob Reinbold Spielmann as chair of chemistry, natural history and materia medica. In 1794 he became professor of botany and materia medica in the new School of Medicine.

He was the author of Tabula affinitatum animalium (1783) and Observationes zoologicae quibus novae complures, published posthumously in 1804. His collections and library of 18,000 volumes formed the basis of the Natural History Museum of Strasbourg, where a reconstruction of his natural history cabinet was opened in 1988. Hermann was also in charge of Strasbourg's botanical garden, where he was responsible for a large increase in the number of living plant species. The garden was threatened with closure by the city administration during the French Revolution, and was only saved by the efforts of Hermann.

His zoological collection, including 200 mammals, 900 birds, more than 200 reptiles, many fish, invertebrates and dried plants, was bought by the city of Strasbourg in 1804 and served as the base for the Strasbourg zoological Museum.

His brother, Jean-Frédéric Hermann (1743–1820), Professor of Law, was a member of the Lower Rhine and Mayor of Strasbourg. His son, Jean-Frédéric Hermann (1768–1793), would follow in his footsteps both in medicine and in natural history, until his untimely death during the revolutionary wars put an end to his ambitions. Hermann's name survives most famously through Hermann's tortoise (Testudo hermanni ).

References

Further reading Damkaer DM (2002). The Copepodologist's Cabinet. A Biographical and Bibliographical History. Philadelphia: American Philosophical Society. xix + 300 pp., Figures 93–96, Portrait. Rose HJ (1850). A New General Biographical Dictionary. Volume VIII. GEO—JEN. London. 512 pp. ("Hermann, (John) [sic]", pp. 292–293).

Illustrations

Worked examples

Example 1 — a first encounter with Johann Hermann

Start with the simplest possible case. Write down what Johann Hermann 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 Johann Hermann 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 Johann Hermann 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 Johann Hermann

In research: Johann Hermann 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 Johann Hermann 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: Johann Hermann is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1738 births, 1800 deaths, 18th-century French medical doctors, so understanding it makes those chapters shorter.
In everyday life: Look for Johann Hermann 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 Johann Hermann in 20 minutes

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

Frequently asked questions

What is Johann Hermann in simple terms?

Why does Johann Hermann 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 Johann Hermann?

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 Johann Hermann.