astronomy

Hisashi Kimura

Hisashi Kimura 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 Hisashi Kimura rather than just read about it. In short: Hisashi Kimura (木村栄, Kimura Hisashi; October 4, 1870 – September 26, 1943) was a Japanese astronomer originally from Kanazawa, Ishikawa. He devoted his career to the study and measurement of variation in latitude, building upon the work of Seth Carlo Chandler, who discovered the Chandler wobble.

Key takeaways

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

Reference excerpt

Hisashi Kimura (木村栄, Kimura Hisashi; October 4, 1870 – September 26, 1943) was a Japanese astronomer originally from Kanazawa, Ishikawa. He devoted his career to the study and measurement of variation in latitude, building upon the work of Seth Carlo Chandler, who discovered the Chandler wobble. In 1899, he became the first director of the International Latitude Observatory at Mizusawa, Japan. He won the Gold Medal of the Royal Astronomical Society in 1936. He was one of the first people to be awarded the Order of Culture when it was established in 1937. The crater Kimura on the Moon is named after him, the same for the asteroid 6233 Kimura.

References

External links Awarding of RAS Gold Medal Obituary Kimura, Hisashi | Portraits of Modern Japanese Historical Figures (National Diet Library)

Illustrations

Worked examples

Example 1 — a first encounter with Hisashi Kimura

Start with the simplest possible case. Write down what Hisashi Kimura 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 Hisashi Kimura 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 Hisashi Kimura 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 Hisashi Kimura

In research: Hisashi Kimura 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 Hisashi Kimura 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: Hisashi Kimura is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1870 births, 1943 deaths, 19th-century Japanese astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Hisashi Kimura 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 Hisashi Kimura in 20 minutes

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

Frequently asked questions

What is Hisashi Kimura in simple terms?

Why does Hisashi Kimura 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 Hisashi Kimura?

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 Hisashi Kimura.