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Hume (crater)

Hume (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 Hume (crater) rather than just read about it. In short: Hume is a small lunar impact crater that lies along the eastern limb of the Moon, along the southeast edge of Mare Smythii. It is located just on the far side of the Moon, but it is often brought into sight from Earth due to libration.

Hume (crater) — main illustration
Hume (crater) — illustration

Key takeaways

  • Hume (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 Hume (crater) to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Hume (crater) from memory before moving on to harder problems.

Reference excerpt

Hume is a small lunar impact crater that lies along the eastern limb of the Moon, along the southeast edge of Mare Smythii. It is located just on the far side of the Moon, but it is often brought into sight from Earth due to libration. Hume lies just to the west-northwest of the much larger Hirayama, and to the northeast of the flooded crater Swasey. Hume has been flooded by flows of basaltic lava, leaving only a slender rim projecting above the surface. Its interior floor is level and has the same low albedo as the lunar mare to the northwest. The rim has a wide gap at the northern end, and the floor lies open to the exterior. This feature is not marked by any overlying impacts of note. Hume is about 650 meters deep when measured from the high point on the southeast rim to the low point on the crater floor.

Satellite craters By convention, these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Hume.

References

External links LTO-82A4 Hirayama — L&PI topographic map

Illustrations

Hume (crater) illustration
Hume (crater): Oblique Apollo 14 image, with Hume in foreground, Hume A at right, and Hume Z above center
Oblique Apollo 14 image, with Hume in foreground, Hume A at right, and Hume Z above center
Hume (crater): Similar view from Apollo 17
Similar view from Apollo 17

Worked examples

Example 1 — a first encounter with Hume (crater)

Start with the simplest possible case. Write down what Hume (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 Hume (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 Hume (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 Hume (crater)

In research
Hume (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 Hume (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
Hume (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ22 quadrangle, so understanding it makes those chapters shorter.
In everyday life
Look for Hume (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 Hume (crater) in 20 minutes

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

Frequently asked questions

What is Hume (crater) in simple terms?

Hume is a small lunar impact crater that lies along the eastern limb of the Moon, along the southeast edge of Mare Smythii. It is located just on the far side of the Moon, but it is often brought into sight from Earth due to libration.

Why does Hume (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 Hume (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 Hume (crater).

Tags

  • Impact craters on the Moon
  • LQ22 quadrangle

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