astronomy

Marjorie Hall Harrison

Marjorie Hall Harrison 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 Marjorie Hall Harrison rather than just read about it. In short: Marjorie Hall Harrison (September 14, 1918 – August 6, 1986) was an English-born American astronomer. Hall was born in Nottingham, England in September 1918.

Key takeaways

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

Reference excerpt

Marjorie Hall Harrison (September 14, 1918 – August 6, 1986) was an English-born American astronomer. Hall was born in Nottingham, England in September 1918. In 1947, she authored one of the first scientific books, a dissertation while at the Yerkes Observatory of the University of Chicago, with the word "model" in the title. This work describes the processes that fuel stars and is among the first works that endeavored to create detailed mathematical models for complex physical systems. Along with Subrahmanyan Chandrasekhar, George Gamow and G. Keller, Harrison published models in 1944, 1946 and 1947 discussing stars modeled with hydrogen-depleted and isothermal cores. As a doctoral student of S. Chandrasekhar at the University of Chicago, she received a degree in astronomy in 1947. A brother, Cecil Hall, was one of Eli Franklin Burton's graduate students who built the first practical electron microscope at the University of Toronto in 1938. Hall Harrison died in Huntsville, Texas in August 1986 at the age of 67.

References Harrison, Marjorie Hall. "Stellar models." Thesis, University of Chicago (1947). "The Generalized Cowling Model." The Astrophysical Journal, vol. 100, p. 343 (1944). "A Stellar Model with a Gravitational Source of Energy." The Astrophysical Journal, vol. 102, p. 216 (1945). "Stellar Models with Partially Degenerate Isothermal Cores and Point-Source Envelopes." The Astrophysical Journal, vol. 103, p. 193 (1946). "Stellar Models with Isothermal Cores and Point-Source Envelopes." The Astrophysical Journal, vol. 105, p. 322 (March, 1947). "On the Chemical Composition of the sun from its Internal Constitution." The Astrophysical Journal, vol. 1098, p. 310 (1948). "Note on the Chemical Composition of the Sun." The Astrophysical Journal, vol. 111, p. 446 (1950). Donald E. Osterbrock. "Chandra and his students at Yerkes Observatory" J. Astrophys. Astr.(1996) 17, 233–268.

References

Worked examples

Example 1 — a first encounter with Marjorie Hall Harrison

Start with the simplest possible case. Write down what Marjorie Hall Harrison 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 Marjorie Hall Harrison 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 Marjorie Hall Harrison 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 Marjorie Hall Harrison

In research: Marjorie Hall Harrison 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 Marjorie Hall Harrison 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: Marjorie Hall Harrison is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1918 births, 1986 deaths, 20th-century British astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Marjorie Hall Harrison 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 Marjorie Hall Harrison in 20 minutes

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

Frequently asked questions

What is Marjorie Hall Harrison in simple terms?

Marjorie Hall Harrison (September 14, 1918 – August 6, 1986) was an English-born American astronomer. Hall was born in Nottingham, England in September 1918.

Why does Marjorie Hall Harrison 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 Marjorie Hall Harrison?

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 Marjorie Hall Harrison.