astronomy

John Armstead Wood

John Armstead Wood 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 John Armstead Wood rather than just read about it. In short: John Armstead Wood (born 1932 in Virginia, United States) is an American astrophysicist. He earned his undergraduate degree from the Virginia Polytechnic Institute, and a doctorate from the Massachusetts Institute of Technology under Gordon J.

Key takeaways

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

Reference excerpt

John Armstead Wood (born 1932 in Virginia, United States) is an American astrophysicist. He earned his undergraduate degree from the Virginia Polytechnic Institute, and a doctorate from the Massachusetts Institute of Technology under Gordon J. F. MacDonald. He then joined the Smithsonian Astrophysical Observatory, which he retired from in 2004. He was elected to the American Academy of Arts and Sciences in 1992. The Hungaria-type asteroid (4736) Johnwood is named in his honor. His papers are archived with the Smithsonian Institution.

Work Wood's research involved the petrological study of chondritic meteorites towards an understanding of the origin of the Solar System. Wood analyzed lunar samples from the Apollo 11 mission. He presented his results at the first Lunar and Planetary Science Conference in 1970. In the course of his work, he developed models of the Moon's formation and its internal evolution. Wood was an investigator in the RADIG group that specified the entire workflow for the radar science data collected by the Magellan mission to Venus. Wood chaired the Committee on Planetary and Lunar Exploration (COMPLEX) from 1999-2002, under the Space Studies Board of the National Research Council.

Literature "The Moon" (Vol. 233 No. 3 (September 1975), p. 92), "The Lunar Soil" (Vol. 223 No. 2 (August 1970), p. 14), and "Chrondrites and Chrondules" (Vol. 209 No. 4 (October 1963), p. 64) in Scientific American. Wood, John Armstead (1970). "Lunar Anorthosites". Science. 167 (3918): 602–604. Bibcode:1970Sci...167..602W. doi:10.1126/science.167.3918.602. PMID 17781512.

Awards NASA Exceptional Scientific Achievement Medal in 1973. J. Lawrence Smith Medal from the National Academy of Sciences in 1976. Frederick C. Leonard Medal from The Meteoritical Society in 1978. G. K. Gilbert Award in 1992. Whipple Award in 2004.

References

Worked examples

Example 1 — a first encounter with John Armstead Wood

Start with the simplest possible case. Write down what John Armstead Wood 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 John Armstead Wood 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 John Armstead Wood 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 John Armstead Wood

In research: John Armstead Wood 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 John Armstead Wood 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: John Armstead Wood is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1932 births, American astronomers, Living people, so understanding it makes those chapters shorter.
In everyday life: Look for John Armstead Wood 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 John Armstead Wood in 20 minutes

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

Frequently asked questions

What is John Armstead Wood in simple terms?

Why does John Armstead Wood 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 John Armstead Wood?

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 John Armstead Wood.