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astronomy

Henry Crew

Henry Crew 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 Henry Crew rather than just read about it. In short: Henry Crew (June 4, 1859 – February 17, 1953) was an American physicist and astronomer. Born in Richmond, Ohio, the son of William H.

Henry Crew — main illustration
Henry Crew — illustration

Key takeaways

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

Reference excerpt

Henry Crew (June 4, 1859 – February 17, 1953) was an American physicist and astronomer. Born in Richmond, Ohio, the son of William H. Crew and Deborah Ann, he attended high school in Wilmington, Ohio then matriculated to Princeton University in 1878. He graduated with an A.B. in physics 1882 and was awarded a graduate fellowship at the university for a year, which he spent at the Princeton laboratory. In 1883 he traveled for a semester overseas to study physics in Berlin, returning in 1884 to attend graduate school at the Johns Hopkins University. Three years later he was awarded a Ph.D. in physics with a thesis on "Doppler Determination of the Rotation Period of the Sun for Various Heliocentric Latitudes." After a term with an associateship in physics at Johns Hopkins, he became an assistant instructor of physics at Haverford College from 1888–1892. During his last year at Haverford, Henry Crew was married to Helen C. Coale, a graduate of Bryn Mawr College. He then joined the staff of the Lick Observatory in 1892, but soon found himself entangled in the political atmosphere. That year he was awarded the position of Fayerweather professor of physics at Northwestern University, which he accepted. He would remain at that post until he retired 41 years later in 1933. While at Northwestern, he was elected to the United States National Academy of Sciences, the American Academy of Arts and Sciences, and the American Philosophical Society. In 1930, he was granted leave from Northwestern to accept an appointment at the Century of Progress International Exposition staged in Chicago 1933–1934, where he was chief of the division of basic sciences. Henry had one son and two daughters before his wife died in 1941. His son William H. Crew would himself become a physicist. During his career, Henry wrote a number of works on spectroscopy, the history of science, and biographies of physicists, producing 123 articles and 12 books. He was elected president of the American Physical Society in 1909. In 1914 he published, with Albert De Salvio, an English translation of Galileo's Two New Sciences. He served as the president of the History of Science Society in 1930. In 1941 he was awarded the Oersted Medal by the American Association of Physics Teachers. He was named a Chevalier of the Order of the Crown of Italy, and was awarded an honorary degree from University of Michigan in 1914, then from Princeton in 1922 and Northwestern in 1937.

Bibliography

References

External links

Henry Crew (1859 - 1953), Richmond Community Historical Society, retrieved 2012-03-24. Portrait of Henry Crew from the Lick Observatory Records Digital Archive, UC Santa Cruz Library's Digital Collections Archived 2016-03-05 at the Wayback Machine

Illustrations

Henry Crew illustration

Worked examples

Example 1 — a first encounter with Henry Crew

Start with the simplest possible case. Write down what Henry Crew 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 Henry Crew 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 Henry Crew 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 Henry Crew

In research
Henry Crew 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 Henry Crew 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
Henry Crew is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1859 births, 1953 deaths, 19th-century American astronomers, so understanding it makes those chapters shorter.
In everyday life
Look for Henry Crew 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 Henry Crew in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Henry Crew means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Henry Crew out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Henry Crew in simple terms?

Henry Crew (June 4, 1859 – February 17, 1953) was an American physicist and astronomer. Born in Richmond, Ohio, the son of William H.

Why does Henry Crew 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 Henry Crew?

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 Henry Crew.

Tags

  • 1859 births
  • 1953 deaths
  • 19th-century American astronomers
  • 20th-century American astronomers
  • American physicists
  • Johns Hopkins University alumni
  • Members of the American Philosophical Society
  • Northwestern University faculty
  • People from Jefferson County, Ohio
  • Presidents of the American Association of University Professors
  • Presidents of the American Physical Society
  • Princeton University alumni

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