astronomy

M. J. Seaton

M. J. Seaton 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 M. J. Seaton rather than just read about it. In short: Michael John Seaton (16 January 1923 – 29 May 2007) was an influential British mathematician, atomic physicist, and astronomer. He was born in Bristol, and educated at Wallington County Grammar School (WCGS), a grammar school in Surrey, where he won prizes for his achievements in chemistry.

Key takeaways

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

Reference excerpt

Michael John Seaton (16 January 1923 – 29 May 2007) was an influential British mathematician, atomic physicist, and astronomer. He was born in Bristol, and educated at Wallington County Grammar School (WCGS), a grammar school in Surrey, where he won prizes for his achievements in chemistry. From 1941 to 1946 he served in the wartime Royal Air Force as a Flight Lieutenant. In this capacity he served first in RAF Bomber Command, navigating Avro Lancasters, and later in one of the elite Pathfinder squadrons navigating de Havilland Mosquitos. After demobilisation, he returned to his studies, and the start of a long career at University College London. Gaining a First Class BSc in physics just two years later, he continued, obtaining his PhD on Quantal Calculations of certain reaction rates with applications to Astrophysical and Geophysical problems in 1951. He later did important work on the quantum defect theory. With a break as Chargé de Recherché at the Institut d'astrophysique de Paris from 1954 to 1955, he rose through the ranks at the Department of Physics at UCL, becoming a Reader in 1959, and Professor of Physics in 1963. He was made a Fellow of the College in 1972, the year in which the Departments of Physics and Astronomy merged. He held the status of Professor Emeritus and Honorary Research Fellow from 1988 until his death. In 1964 he became Fellow-Adjoint at the Joint Institute for Laboratory Astrophysics (JILA) in Boulder, Colorado, a combined venture between the American National Institute of Standards and Technology and the University of Colorado. In 1967 he was elected Fellow of the Royal Society. He held Honorary Membership of the American Astronomical Society, awarded in 1983, and was made Foreign Associate of the United States National Academy of Sciences in 1986. Seaton held the Presidency of the Royal Astronomical Society [RAS] between 1979 and 1981, and was awarded its Gold Medal in 1983. This was followed by the Guthrie Medal and Prize, from the Institute of Physics in 1984, and the Hughes Medal of the Royal Society in 1992. Seaton served as Senior Fellow to the Science and Engineering Research Council EPSRC, 1984–88. Other honours include: Honorary Doctorate, Observatoire de Paris, 1976; Honorary DSc QUB, 1982.

References

External links Obituary, The Times, 7 June 2007 Obituary, The Guardian, 31 August 2007 Obituary, UCL, September 2007 Obituary, Bulletin of the American Astronomical Society, 31 December 2007 Biographical Notes, Harvard-Smithsonian Centre for Astrophysics, August 2006 Atomic Physics & Astrophysics Group - "Research B - Theoretical" section in: From Lardner to Massey, by JW Fox Atoms and Astrophysics: Mike Seaton's legacy - Research meeting held at UCL, April 2008

Worked examples

Example 1 — a first encounter with M. J. Seaton

Start with the simplest possible case. Write down what M. J. Seaton 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 M. J. Seaton 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 M. J. Seaton 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 M. J. Seaton

In research: M. J. Seaton 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 M. J. Seaton 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: M. J. Seaton is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1923 births, 2007 deaths, 20th-century British astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for M. J. Seaton 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 M. J. Seaton in 20 minutes

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

Frequently asked questions

What is M. J. Seaton in simple terms?

Why does M. J. Seaton 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 M. J. Seaton?

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 M. J. Seaton.