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Naonobu (crater)

Naonobu (crater) is a science 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 Naonobu (crater) rather than just read about it. In short: Naonobu is a small lunar impact crater named after Japanese mathematician Ajima Naonobu. It is located on the eastern Mare Fecunditatis, to the northwest of the prominent crater Langrenus, and it forms a triple-crater formation with the adjacent Atwood to the south and Bilharz just to the southwest.

Naonobu (crater) — main illustration
Naonobu (crater) — illustration

Key takeaways

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

Reference excerpt

Naonobu is a small lunar impact crater named after Japanese mathematician Ajima Naonobu. It is located on the eastern Mare Fecunditatis, to the northwest of the prominent crater Langrenus, and it forms a triple-crater formation with the adjacent Atwood to the south and Bilharz just to the southwest. Naonobu and Atwood are separated by only a few kilometres. The interior of this crater has been flooded with basaltic lava, leaving a relatively flat interior and a reduced outer rim. There is no central peak, but a small crater lies just to the southwest of the midpoint. A similar crater lies across the western interior of the rim. This crater was previously designated Langrenus B before being renamed by the IAU in 1976.

References

Sources

External links LTO-80A3 Lunar Topographic Orthophotomap 80A3, Bilharz

Illustrations

Naonobu (crater) illustration
Naonobu (crater): Oblique view of Bilharz (top), Atwood (lower left), and Naonobu (lower right), from Apollo 11
Oblique view of Bilharz (top), Atwood (lower left), and Naonobu (lower right), from Apollo 11

Worked examples

Example 1 — a first encounter with Naonobu (crater)

Start with the simplest possible case. Write down what Naonobu (crater) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Naonobu (crater) 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 Naonobu (crater) 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 Naonobu (crater)

In research
Naonobu (crater) appears in science 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 Naonobu (crater) 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
Naonobu (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ21 quadrangle, so understanding it makes those chapters shorter.
In everyday life
Look for Naonobu (crater) 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 Naonobu (crater) in 20 minutes

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

Frequently asked questions

What is Naonobu (crater) in simple terms?

Naonobu is a small lunar impact crater named after Japanese mathematician Ajima Naonobu. It is located on the eastern Mare Fecunditatis, to the northwest of the prominent crater Langrenus, and it forms a triple-crater formation with the adjacent Atwood to the south and Bilharz just to the southwest.

Why does Naonobu (crater) matter?

Because it connects several science 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 Naonobu (crater)?

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 Naonobu (crater).

Tags

  • Impact craters on the Moon
  • LQ21 quadrangle

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