astronomy

Thierry Legault

Thierry Legault 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 Thierry Legault rather than just read about it. In short: Thierry Legault (born 1962) is a French amateur astronomer, specializing in astrophotography. An engineer by trade, he started astrophotography in 1993 and resorted to CCD cameras to photograph the deep sky.

Key takeaways

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

Reference excerpt

Thierry Legault (born 1962) is a French amateur astronomer, specializing in astrophotography.

An engineer by trade, he started astrophotography in 1993 and resorted to CCD cameras to photograph the deep sky. He then joined the Association des utilisateurs de détecteurs electroniques (l'AUDE), which aims to develop astronomical observation based on electronic detectors. In 1994, along with Christian Buil, he participated in a mission at the Pic du Midi Observatory on the collision of comet Shoemaker-Levy 9 with Jupiter and launched himself into planetary photography. He is the first amateur to have shown on his photographs the division of Encke on the rings of Saturn. His photographs of the deep sky, the planets, the Moon and the Sun (eclipses and HA images) are published in numerous astronomical journals. Its image of the solar transit of the International Space Station (ISS) and the Space Shuttle Atlantis was presented on CNN in the introduction of the weather report of Femi Oke of October 6, 2006. He photographed the transit of the Space Shuttle Atlantis with the Hubble Space Telescope during its service mission in May 2009. He photographed the transit of the International Space Station in front of the sun during the partial eclipse of January 4, 2011. On June 6, 2012, during the transit of Venus, he traveled to Australia to photograph Venus and the Hubble Space Telescope in front of the Sun. The International Astronomical Union gave its name to (19458 Legault) (1998 HE8), an asteroid of the main belt discovered in 1998 by Michel Bœuf. In 1999, the Société astronomique de France awarded him the Marius Jacquemetton Prize, which rewards "a remarkable astronomical work in the field of popularization as well as in the practice of amateur astronomy". He published Le grand atlas de la Lune (The Grand Atlas of the Moon) with Serge Brunier at Éditions Larousse in 2004 and in 2006, Astrophotography, which received the Special Jury Prize of the Festival d'astronomie de Haute-Maurienne 2007.

References

External links astrophoto.fr Thierry Legault's personal page

Illustrations

Worked examples

Example 1 — a first encounter with Thierry Legault

Start with the simplest possible case. Write down what Thierry Legault 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 Thierry Legault 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 Thierry Legault 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 Thierry Legault

In research: Thierry Legault 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 Thierry Legault 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: Thierry Legault is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1962 births, 20th-century French astronomers, 21st-century French astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Thierry Legault 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 Thierry Legault in 20 minutes

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

Frequently asked questions

What is Thierry Legault in simple terms?

Thierry Legault (born 1962) is a French amateur astronomer, specializing in astrophotography. An engineer by trade, he started astrophotography in 1993 and resorted to CCD cameras to photograph the deep sky.

Why does Thierry Legault 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 Thierry Legault?

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 Thierry Legault.