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Hartmann (crater)

Hartmann (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 Hartmann (crater) rather than just read about it. In short: Hartmann is a lunar impact crater on the far side of the Moon. It lies astride the west-southwestern rim of a huge walled plain named Mendeleev, and intrudes part way into the wide inner wall of this feature.

Hartmann (crater) — main illustration
Hartmann (crater) — illustration

Key takeaways

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

Reference excerpt

Hartmann is a lunar impact crater on the far side of the Moon. It lies astride the west-southwestern rim of a huge walled plain named Mendeleev, and intrudes part way into the wide inner wall of this feature. Nearly attached to the northwestern rim of Hartmann is the crater Green. The unusual placement of this crater and the proximity of Green have given Hartmann a somewhat oddly shaped outer rim. The rim is slightly oblong in shape and it has an outward bulge to the east. The inner wall is wider on the eastern side, offsetting the interior floor to the western side. This floor is also oval in shape and is somewhat irregular. The crater was named after German astronomer Johannes Franz Hartmann in 1970. Prior to that, this crater was designated Crater 217.

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 Hartmann.

References

Sources

External links

Hartmann at The Moon Wiki

Illustrations

Hartmann (crater) illustration
Hartmann (crater): Oblique view facing south from Apollo 16
Oblique view facing south from Apollo 16
Hartmann (crater): Hartmann K crater, from Apollo 11
Hartmann K crater, from Apollo 11

Worked examples

Example 1 — a first encounter with Hartmann (crater)

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

In research
Hartmann (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 Hartmann (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
Hartmann (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ15 quadrangle, so understanding it makes those chapters shorter.
In everyday life
Look for Hartmann (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 Hartmann (crater) in 20 minutes

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

Frequently asked questions

What is Hartmann (crater) in simple terms?

Hartmann is a lunar impact crater on the far side of the Moon. It lies astride the west-southwestern rim of a huge walled plain named Mendeleev, and intrudes part way into the wide inner wall of this feature.

Why does Hartmann (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 Hartmann (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 Hartmann (crater).

Tags

  • Impact craters on the Moon
  • LQ15 quadrangle

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