astronomy

Issei Yamamoto

Issei Yamamoto 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 Issei Yamamoto rather than just read about it. In short: Issei Yamamoto (山本一清, Yamamoto Issei; 1889–1959) was a Japanese astronomer and professor at Kyoto University. In 1920, he became first president of the Oriental Astronomical Association.

Key takeaways

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

Reference excerpt

Issei Yamamoto (山本一清, Yamamoto Issei; 1889–1959) was a Japanese astronomer and professor at Kyoto University. In 1920, he became first president of the Oriental Astronomical Association. He was director of the Kwasan Observatory in Kyoto.

Honors Named after him:

The crater Yamamoto on the Moon. Asteroid 2249 Yamamoto.

References

Illustrations

Worked examples

Example 1 — a first encounter with Issei Yamamoto

Start with the simplest possible case. Write down what Issei Yamamoto 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 Issei Yamamoto 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 Issei Yamamoto 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 Issei Yamamoto

In research: Issei Yamamoto 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 Issei Yamamoto 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: Issei Yamamoto is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1889 births, 1959 deaths, 20th-century Japanese astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Issei Yamamoto 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 Issei Yamamoto in 20 minutes

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

Frequently asked questions

What is Issei Yamamoto in simple terms?

Issei Yamamoto (山本一清, Yamamoto Issei; 1889–1959) was a Japanese astronomer and professor at Kyoto University. In 1920, he became first president of the Oriental Astronomical Association.

Why does Issei Yamamoto 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 Issei Yamamoto?

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 Issei Yamamoto.