science

Ibn Firnas (crater)

Ibn Firnas (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 Ibn Firnas (crater) rather than just read about it. In short: Ibn Firnas is a lunar impact crater on the far side of the Moon. Attached to the exterior of its southwestern rim is the prominent crater King.

Key takeaways

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

Reference excerpt

Ibn Firnas is a lunar impact crater on the far side of the Moon. Attached to the exterior of its southwestern rim is the prominent crater King. Only a few kilometers to the north, separated by a rugged stretch of terrain, is the larger crater Ostwald. Ibn Firnas is a worn and eroded crater with small impacts along the northern and eastern rims. The satellite crater Ibn Firnas L lies along the inner wall to the southeast and covers part of the interior floor. Along the northern side, the small satellite crater Ibn Firnas Y cuts through the rim and overlays part of the inner wall. The interior floor is irregular along the northern and southwest sections where their shape has been modified by the large nearby craters mentioned above. Several small craters lie across the remainder of the interior floor.

In 1976 the crater was named by the IAU after Abbas Ibn Firnas, a polymath from Andalucia who, in the 9th century, devised a chain of rings that could be used to simulate the motions of the planets and stars. Prior to 1976, this crater was known as Crater 213.

Nearby craters Several small craters located in the rugged terrain at the northern edge of this crater have been assigned names by the IAU. These are listed in the table below.

The crater Melissa lies across the north-northwestern outer rim of Ibn Firnas. It is a roughly bowl-shaped, although it has a very uneven appearance due to the irregular terrain in which it was formed. Melissa was previously designated Ibn Firnas Y before it was assigned a name by the IAU. The locations of these craters are shown on the following L&PI topographic maps:

LTO-65B4 Recht LTO-65C1 King

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 Ibn Firnas.

References

Sources

External links

LTO65C1 King Lunar Topographic Orthophotomap, 1974

Illustrations

Worked examples

Example 1 — a first encounter with Ibn Firnas (crater)

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

In research: Ibn Firnas (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 Ibn Firnas (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: Ibn Firnas (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ14 quadrangle, so understanding it makes those chapters shorter.
In everyday life: Look for Ibn Firnas (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 Ibn Firnas (crater) in 20 minutes

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

Frequently asked questions

What is Ibn Firnas (crater) in simple terms?

Ibn Firnas is a lunar impact crater on the far side of the Moon. Attached to the exterior of its southwestern rim is the prominent crater King.

Why does Ibn Firnas (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 Ibn Firnas (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 Ibn Firnas (crater).