astronomy

Roger Davies (astrophysicist)

Roger Davies (astrophysicist) 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 Roger Davies (astrophysicist) rather than just read about it. In short: Roger Llewelyn Davies (born 13 January 1954) is a British astronomer and cosmologist, one of the so-called Seven Samurai collaboration who discovered an apparent concentration of mass in the Universe called the Great Attractor. He is the emeritus Philip Wetton Professor of Astrophysics in the Department of Physics, Oxford University and Student of Christ Church.

Key takeaways

Roger Davies (astrophysicist) belongs to astronomy; place it in that map before memorising details.
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Reproduce the core statement of Roger Davies (astrophysicist) from memory before moving on to harder problems.

Reference excerpt

Roger Llewelyn Davies (born 13 January 1954) is a British astronomer and cosmologist, one of the so-called Seven Samurai collaboration who discovered an apparent concentration of mass in the Universe called the Great Attractor. He is the emeritus Philip Wetton Professor of Astrophysics in the Department of Physics, Oxford University and Student of Christ Church. His research interests centre on cosmology and how galaxies form and evolve. He has a longstanding interest in astronomical instruments and telescopes and promoted the scientific case for the UK's involvement in the 8m Gemini telescopes project that constructed telescopes in Hawaii and Chile. He has pioneered the use of a new class of astronomical spectrograph to measure the masses and ages of galaxies, as well as search for black holes in their nuclei. He was the founding director of the Hintze Centre for Astrophysical Surveys.

Career and research Davies took his first degree in physics at University College London (UCL) and his PhD at the Institute of Astronomy and Churchill College, Cambridge. Posts at Lick Observatory, California, then Cambridge and Kitt Peak National Observatory, Arizona, followed. While at Kitt Peak he became part of the Seven Samurai collaboration which surveyed the distances and velocities of 400 nearby elliptical galaxies, discovering the Great Attractor, at that time thought to be pulling the Milky Way and other galaxies in the direction of the constellations of Hydra and Centaurus. Returning to the UK, Davies was based in Oxford leading the team that developed a proposal for UK participation in an 8-m telescope project which ultimately led to the establishment of the Gemini Observatory, twin 8m telescopes in Hawaii and Chile. He became Head of Astronomy at Durham University in 1994 where he developed his interest in integral field spectroscopy and played a leading role in building instruments for Gemini (GMOS) and the William Herschel Telescope (SAURON). He used these to map the motions and composition of the gas and stars in galaxies leading to new insights into galaxy evolution and the supermassive black holes they host. Davies returned to Oxford in 2002 as the first Philip Wetton Professor of Astrophysics (a post he held in conjunction with a Studentship at Christ Church, Oxford) to pursue research in cosmology and the evolution of galaxies. He was head of the physics department from 2005 to 2010 and head of astrophysics from 2011 to 2014. From 2014 to 2022 he was the founding director of the Oxford Hintze Centre for Astrophysical Surveys. He is a Fellow of UCL, of the Royal Astronomical Society and of the Institute of Physics. He holds an honorary degree from University Claude Bernard in Lyon, France. He was President of the Royal Astronomical Society between 2010 and 2012, and President of the European Astronomical Society from 2017-2024. In 2021 he was awarded the Fred Hoyle Medal and Prize by the Institute of Physics for "seminal contributions to understanding the nature and evolution of early-type galaxies and developing their use as cosmological probes". He was elected to the Association of Universities for Research in Astronomy (AURA) Board of Directors in 2021.

References

External links Personal CV Royal Astronomical Society Press release

Illustrations

Worked examples

Example 1 — a first encounter with Roger Davies (astrophysicist)

Start with the simplest possible case. Write down what Roger Davies (astrophysicist) 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 Roger Davies (astrophysicist) 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 Roger Davies (astrophysicist) 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 Roger Davies (astrophysicist)

In research: Roger Davies (astrophysicist) 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 Roger Davies (astrophysicist) 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: Roger Davies (astrophysicist) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1954 births, 21st-century British astronomers, Alumni of Churchill College, Cambridge, so understanding it makes those chapters shorter.
In everyday life: Look for Roger Davies (astrophysicist) 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 Roger Davies (astrophysicist) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Roger Davies (astrophysicist) means in your own words.
Compare your version with the excerpt and mark what you missed.
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Frequently asked questions

What is Roger Davies (astrophysicist) in simple terms?

Why does Roger Davies (astrophysicist) 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 Roger Davies (astrophysicist)?

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 Roger Davies (astrophysicist).