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Lassell (lunar crater)

Lassell (lunar 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 Lassell (lunar crater) rather than just read about it. In short: Lassell is a small lunar impact crater that is located in the eastern part of the Mare Nubium. It was named after British astronomer William Lassell, who discovered Uranian moons Ariel and Umbriel, among other achievements.

Lassell (lunar crater) — main illustration
Lassell (lunar crater) — illustration

Key takeaways

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

Reference excerpt

Lassell is a small lunar impact crater that is located in the eastern part of the Mare Nubium. It was named after British astronomer William Lassell, who discovered Uranian moons Ariel and Umbriel, among other achievements. Lassell lies to the west of the crater Alpetragius and southwest of Alphonsus.

Description The interior of Lassell has been flooded and resurfaced by lava, leaving a nearly flat surface with a low remaining outer rim. The surface has a low albedo, giving the interior a dark appearance. The surviving outer wall is generally circular but with a somewhat polygonal shape. To the east-northeast is a circular, bowl-shaped crater designated Lassell B. This formation has a higher albedo than its surroundings and so appears relatively bright, especially at high sun angles. The tiny crater Lassell D is located to the west-northwest of Lassell, about halfway to the ruined crater Guericke. This craterlet is surrounded by a patch of high-albedo surface, and is an example of a prominent lunar bright patch. The light hue is thought to be an indication of recent formation, at least in lunar geological terms.

Lassell massif To the west of Lassell, at coordinates 14.65°S, 350.96°E is a small highland area called the Lassell Massif, which has a reddish color relative to the surrounding mare. The massif was created by series of eruptions of viscous silicic lavas starting 4.07+0.05−0.08 billion years ago. Its surface is suspected to be partially buried by ejecta from Copernicus crater. The southern domes Lassell G and Lassell K have most silica-rich composition and feature a caldera-like depressions on tops.

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 Lassell.

References

Sources

External links

Lassell at The Moon Wiki Wood, Chuck (February 13, 2007). "New Observations of a Well-Known Area". Lunar Photo of the Day. Archived from the original on June 14, 2011. Wood, Chuck (January 31, 2010). "Spotted Moon". Lunar Photo of the Day. Archived from the original on January 14, 2015. Retrieved September 25, 2017.

Illustrations

Lassell (lunar crater) illustration
Lassell (lunar crater): Oblique view of Lassell from Apollo 16, facing south
Oblique view of Lassell from Apollo 16, facing south
Lassell (lunar crater): Oblique view of vicinity of Lassell from Apollo 12, with Davy in the foreground
Oblique view of vicinity of Lassell from Apollo 12, with Davy in the foreground
Lassell (lunar crater): Oblique view of Lassell C (center) and the Lassell Massif (left), from Apollo 16. The irregular depressions in upper left are called Lassel G and K.
Oblique view of Lassell C (center) and the Lassell Massif (left), from Apollo 16. The irregular depressions in upper left are called Lassel G and K.

Worked examples

Example 1 — a first encounter with Lassell (lunar crater)

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

In research
Lassell (lunar 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 Lassell (lunar 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
Lassell (lunar crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ19 quadrangle, so understanding it makes those chapters shorter.
In everyday life
Look for Lassell (lunar 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 Lassell (lunar crater) in 20 minutes

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

Frequently asked questions

What is Lassell (lunar crater) in simple terms?

Lassell is a small lunar impact crater that is located in the eastern part of the Mare Nubium. It was named after British astronomer William Lassell, who discovered Uranian moons Ariel and Umbriel, among other achievements.

Why does Lassell (lunar 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 Lassell (lunar 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 Lassell (lunar crater).

Tags

  • Impact craters on the Moon
  • LQ19 quadrangle

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