astronomy

Wrexie Leonard

Wrexie Leonard 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 Wrexie Leonard rather than just read about it. In short: Wrexie Leonard (September 15, 1867 – November 9, 1937), also known as Louise Leonard, was an American astronomer who worked as an assistant to Percival Lowell and published her observations of Mars. The Leonard Crater on Venus is named for her.

Key takeaways

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

Reference excerpt

Wrexie Leonard (September 15, 1867 – November 9, 1937), also known as Louise Leonard, was an American astronomer who worked as an assistant to Percival Lowell and published her observations of Mars. The Leonard Crater on Venus is named for her.

Biography Wrexie Louise Leonard was raised in Troy, Pennsylvania, and later moved to Boston. She was private secretary and assistant to the astronomer Percival Lowell for over two decades, from 1893 until Lowell's death. She managed Lowell's correspondence, edited his many articles and speeches, and traveled with him extensively. In 1895, she traveled to Africa with Lowell to look for a site for a new observatory, which was later established in Flagstaff, Arizona. After the establishment of the observatory, now the Lowell Observatory, she carried out astronomical observations there, studying the planets Mercury, Venus, Jupiter, and especially Mars. The observatory's logbooks show that "W.L.L." carried out observations frequently in the early years, and include sketches that she made of Mars and Venus. This indicates that she was regularly using the large telescope a half century before it became common for women in astronomy to do so.

Leonard also supervised the laboratory during Lowell's absences, and accompanied him to Tacubaya, outside Mexico City, when the large Clark refractor was shipped there in 1896 for one of several oppositions of Mars that she would observe. In 1907, she published her drawings of Mars in Popular Astronomy with notes on the planet—its ice caps, Lowell's 'canals'— during some of the years when it was in opposition (1901, 1903, 1905). In 1904, Leonard was inducted into the Societé Astronomique de France, then an unusual honor for a woman. She was also an honorary member of the Sociedad Astronómica de México. After Lowell's death in 1916, his widow, Constance, fired Leonard and she moved back to the eastern United States. Five years later, she published the memoir Percival Lowell: An Afterglow, which includes passages from her correspondence with Lowell. She lost money in the stock market crash of 1929 and afterwards moved into a home for the aged in Roxbury, Massachusetts; she died in 1937 in the hospital in Medfield, Massachusetts.

Legacy The 31.7-kilometre (19.7 mi) wide Leonard crater on Venus (latitude −73.8, longitude 185.2) is named after her. Leonard was the basis for the character Lulu in Jan Millsapps' 2014 novel Venus on Mars.

Notes and references

Illustrations

Wrexie Leonard: Leonard in 1905 — Leonard in 1905

Worked examples

Example 1 — a first encounter with Wrexie Leonard

Start with the simplest possible case. Write down what Wrexie Leonard 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 Wrexie Leonard 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 Wrexie Leonard 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 Wrexie Leonard

In research: Wrexie Leonard 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 Wrexie Leonard 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: Wrexie Leonard is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1867 births, 1937 deaths, 19th-century American astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Wrexie Leonard 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 Wrexie Leonard in 20 minutes

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

Frequently asked questions

What is Wrexie Leonard in simple terms?

Why does Wrexie Leonard 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 Wrexie Leonard?

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 Wrexie Leonard.