science

Ohm (crater)

Ohm (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 Ohm (crater) rather than just read about it. In short: Ohm is a lunar impact crater that is located on the far side of the Moon. It lies to the south of the crater Comrie, and the satellite crater Comrie K is attached to Ohm's northeastern rim.

Key takeaways

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

Reference excerpt

Ohm is a lunar impact crater that is located on the far side of the Moon. It lies to the south of the crater Comrie, and the satellite crater Comrie K is attached to Ohm's northeastern rim. To the northwest is the larger Shternberg, and to the southwest is Kamerlingh Onnes. It is named after the German physicist Georg Simon Ohm. This formation dates to the Copernican period and has a meteoritic iron-rich impact melt. It is located at the origin of a ray system that extends for several hundred kilometers across the surrounding lunar terrain. The exterior surface for about 20–30 km is relatively free of the ray material, but beyond that perimeter is a skirt of higher albedo, with streaks extending to the northwest, east-northeast, and southwards. The outer rim of Ohm is sharply defined, except at the southern end where the edge is somewhat irregular. The inner surface drops down to an interior blanket of slumped material that slopes down to the floor. The crater has a modest central peak. The spectra of this rise fits a gabbro mineralogy, which was excavated from a depth of 6.4 to 9.9 km. Prior to formal naming by the IAU in 1970, Ohm was called Crater 253.

Artemis II The view of Ohm and its surroundings was first captured by human eyes during the lunar flyby of Artemis II in April 2026. The typical chevron-shaped system of Ohm's bright rays was easily noticeable during the approach of the gibbous moon, which was gradually showing its western hemisphere and the far side regions beyond 90° west.

References

Sources

External links Media related to Ohm (lunar crater) at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Ohm (crater)

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

In research: Ohm (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 Ohm (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: Ohm (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ09 quadrangle, so understanding it makes those chapters shorter.
In everyday life: Look for Ohm (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 Ohm (crater) in 20 minutes

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

Frequently asked questions

What is Ohm (crater) in simple terms?

Ohm is a lunar impact crater that is located on the far side of the Moon. It lies to the south of the crater Comrie, and the satellite crater Comrie K is attached to Ohm's northeastern rim.

Why does Ohm (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 Ohm (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 Ohm (crater).