astronomy

Réginald Outhier

Réginald Outhier 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 Réginald Outhier rather than just read about it. In short: Abbé Réginald Outhier also given as Regnauld or Renaud Outhier (16 August 1694 – 12 April 1774) was a French clergyman, traveller, and writer who worked on cartography and astronomy. Outhier was born at La Marre-Jouserans, near Poligny, France, and studied at Dole and Besançon.

Key takeaways

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

Reference excerpt

Abbé Réginald Outhier also given as Regnauld or Renaud Outhier (16 August 1694 – 12 April 1774) was a French clergyman, traveller, and writer who worked on cartography and astronomy. Outhier was born at La Marre-Jouserans, near Poligny, France, and studied at Dole and Besançon. He became a priest at Besançon, where he became interested in astronomy. He later served as a canon at Bayeux Cathedral. In 1726–1727 he presented a 5-inch-diameter celestial globe to the Académie Royale des Sciences, which demonstrated the movements of the sun and stars with a clockwork mechanism. This impressed Cassini II who made him a correspondent to the Royal Academy in 1731. In 1733 he became involved in producing a map of France along with Bishop of Bayeux, Paul d'Albert de Luynes and took part in the triangulation surveys from Caen to St. Malo. He was included in the Academy's expedition in 1736–1737 to Lapland to examine the shape of the earth. The expedition was led by Pierre-Louis Moreau de Maupertuis, with the scientists included being Alexis Claude Clairaut, Charles Le Monnier and Charles Etienne Louis Camus. The Swedish scientist Anders Celsius was also involved and Outhier was included as physician, astronomer and maintainer of the journal of the expedition. He drew maps of the travels and published the notes on the voyage in 1744. In 1752 he drew an accurate map of the night sky covering the Pleiades.

References

External links Journal d’un voyage au nord, en 1736 et 1737 (1744)

Illustrations

Worked examples

Example 1 — a first encounter with Réginald Outhier

Start with the simplest possible case. Write down what Réginald Outhier 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 Réginald Outhier 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 Réginald Outhier 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 Réginald Outhier

In research: Réginald Outhier 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 Réginald Outhier 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: Réginald Outhier is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1694 births, 1774 deaths, French astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Réginald Outhier 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 Réginald Outhier in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Réginald Outhier 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 Réginald Outhier out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Réginald Outhier in simple terms?

Why does Réginald Outhier 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 Réginald Outhier?

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 Réginald Outhier.