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Mary Lea Heger

Mary Lea Heger 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 Mary Lea Heger rather than just read about it. In short: Mary Lea Heger (July 13, 1897 – July 13, 1983, later Mary Lea Shane) was an American astronomer who made important discoveries on the interstellar medium. She later founded the Lick Observatory Archives located in the Dean E.

Key takeaways

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

Reference excerpt

Mary Lea Heger (July 13, 1897 – July 13, 1983, later Mary Lea Shane) was an American astronomer who made important discoveries on the interstellar medium. She later founded the Lick Observatory Archives located in the Dean E. McHenry Library. In 1982, her monument at Lick was renamed the Mary Lea Shane Archives of Lick Observatory.

Education and career She was born in Wilmington, Delaware. During childhood, Heger's family moved west to Belvedere on the San Francisco Bay, where she spent her youth. Heger received her bachelor's degree in 1919 from the University of California, Berkeley, becoming a graduate student in astronomy. After marrying C. Donald Shane in 1920 she completed her PhD in 1924, writing a thesis under the supervision of W. W. Campbell at Lick Observatory that was one of the first papers to recognize the sharp, stationary Na I absorption lines in the spectra of distant binaries as interstellar in origin. She was also the discoverer of the diffuse interstellar bands.

Retirement Deciding to focus on raising her two small children, Heger gave up the notion of a professional career. At the end of World War II when her husband became director of Lick Observatory, Heger became a well-known scientific hostess and was remembered for her generous hospitality.

Death Mary Lea Shane died on her 86th birthday of a heart attack at her home in Scotts Valley, California on July 13, 1983.

References

Worked examples

Example 1 — a first encounter with Mary Lea Heger

Start with the simplest possible case. Write down what Mary Lea Heger 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 Mary Lea Heger 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 Mary Lea Heger 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 Mary Lea Heger

In research
Mary Lea Heger 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 Mary Lea Heger 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
Mary Lea Heger is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1897 births, 1983 deaths, 20th-century American people, so understanding it makes those chapters shorter.
In everyday life
Look for Mary Lea Heger 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 Mary Lea Heger in 20 minutes

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

Frequently asked questions

What is Mary Lea Heger in simple terms?

Mary Lea Heger (July 13, 1897 – July 13, 1983, later Mary Lea Shane) was an American astronomer who made important discoveries on the interstellar medium. She later founded the Lick Observatory Archives located in the Dean E.

Why does Mary Lea Heger 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 Mary Lea Heger?

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 Mary Lea Heger.

Tags

  • 1897 births
  • 1983 deaths
  • 20th-century American people
  • 20th-century American women
  • American women astronomers
  • People from Scotts Valley, California
  • People from Wilmington, Delaware
  • University of California, Berkeley alumni

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