astronomy

Nigel Weiss

Nigel Weiss 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 Nigel Weiss rather than just read about it. In short: Nigel Oscar Weiss FRS (16 December 1936 – 24 June 2020) was an astronomer and mathematician, and leader in the field of astrophysical and geophysical fluid dynamics. He was emeritus professor of mathematical astrophysics at the University of Cambridge.

Key takeaways

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

Reference excerpt

Nigel Oscar Weiss FRS (16 December 1936 – 24 June 2020) was an astronomer and mathematician, and leader in the field of astrophysical and geophysical fluid dynamics. He was emeritus professor of mathematical astrophysics at the University of Cambridge.

Education Born in South Africa, Weiss studied at Hilton College, Natal, Rugby School and Clare College, Cambridge, and had been a fellow of Clare College since 1965. He read for his PhD in 1961 with a thesis on Variable Hydromagnetic Motions.

Career In 1987 he became Professor of Mathematical Astrophysics at the University of Cambridge. Between 2000 and 2002 he was President of the Royal Astronomical Society, and in 2007 was awarded the Gold Medal, the society's highest award.

Research Weiss published extensively in the field of mathematical astrophysics, specialising in solar and stellar magnetic fields, astrophysical and geophysical fluid dynamics and nonlinear dynamical systems. In 1966 he was the first to demonstrate and describe the process of 'flux expulsion' by which a conducting fluid undergoing rotating motion acts to expel the magnetic flux from the region of motion, a process now known to occur in the photosphere of the Sun and other stars.

Awards and honours Weiss was elected a Fellow of the Royal Society (FRS) in 1992. His nomination reads Professor Weiss is distinguished for his work in the theory of convection, for developing appropriate numerical techniques, and for pioneering their use in precise numerical experiments to gain a qualitative and comprehensive understanding of the behaviour of complicated nonlinear systems. Among many notable achievements in this field, he has been instrumental in the identification of a period-doubling route to chaos in a system of partial differential equations describing doubly-diffusive convection. He has made wide-ranging studies of the magneto-convective processes occurring in the Sun and similar stars. In early work of lasting influence, he analysed the process of magnetic flux expulsion and the mechanism of concentration of magnetic field into ropes from which fluid motion is excluded. In recent work, he has initiated a program of research in the field of nonlinear compressible convection, an important step towards realistic modelling of stellar convection zones.

References

Worked examples

Example 1 — a first encounter with Nigel Weiss

Start with the simplest possible case. Write down what Nigel Weiss 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 Nigel Weiss 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 Nigel Weiss 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 Nigel Weiss

In research: Nigel Weiss 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 Nigel Weiss 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: Nigel Weiss is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1936 births, 2020 deaths, Alumni of Clare College, Cambridge, so understanding it makes those chapters shorter.
In everyday life: Look for Nigel Weiss 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 Nigel Weiss in 20 minutes

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

Frequently asked questions

What is Nigel Weiss in simple terms?

Why does Nigel Weiss 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 Nigel Weiss?

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 Nigel Weiss.