science

Messala (crater)

Messala (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 Messala (crater) rather than just read about it. In short: Messala is a lunar impact crater of sufficient dimension to belong to the category of impact features known as walled plains. It is located in the northeastern part of the Moon, close enough to the rim to appear significantly foreshortened.

Key takeaways

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

Reference excerpt

Messala is a lunar impact crater of sufficient dimension to belong to the category of impact features known as walled plains. It is located in the northeastern part of the Moon, close enough to the rim to appear significantly foreshortened. It was named by the IAU in 1935. The outer rim of this formation has received a significant amount of erosion due to minor impacts, but much of the outer wall retains its original shape and a certain degree of terracing. The rim is broken by smaller craters along the south, north, and northwest sides, designated Messala B, J, and K, respectively. Messala J has a narrow gouge in its eastern rim leading one crater diameter to the east. It is attached to a slightly larger crater which lies across the southern rim of Schumacher crater. The interior floor is relatively level but contains irregularities in the surface at some locations, including some dark fractures in the northwestern floor. There is a ghost crater along the western inner wall. To the southwest is the prominent crater Geminus, and due south is the smaller Bernoulli.

Origin of name The crater is named after Masha'allah ibn Atharī (c.740-d.815 AD), a Persian Jewish astrologer and astronomer from the city of Basra (now located in modern-day Iraq) who was the leading astrologer of the late 8th century. Masha'allah was one of the most prominent members of the commission which decided for Caliph al-Mansur (A.D. 754–775) that the propitious moment for the founding of Baghdad fell on 30 July 762.

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 Messala.

References

Sources

Illustrations

Worked examples

Example 1 — a first encounter with Messala (crater)

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

In research: Messala (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 Messala (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: Messala (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ06 quadrangle, so understanding it makes those chapters shorter.
In everyday life: Look for Messala (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 Messala (crater) in 20 minutes

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

Frequently asked questions

What is Messala (crater) in simple terms?

Why does Messala (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 Messala (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 Messala (crater).