science

Stadius (crater)

Stadius (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 Stadius (crater) rather than just read about it. In short: Stadius is a ghostly remnant of an ancient lunar impact crater that has been nearly obliterated by basaltic lava flows. It was named after Flemish astronomer Johannes Stadius.

Key takeaways

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

Reference excerpt

Stadius is a ghostly remnant of an ancient lunar impact crater that has been nearly obliterated by basaltic lava flows. It was named after Flemish astronomer Johannes Stadius. It lies to the southwest of the much younger crater Eratosthenes, at the north edge of Mare Insularum where the mare joins Sinus Aestuum. To the west is the prominent ray crater Copernicus, and multiple secondary craters from the Copernican ejecta cover this area. To the northwest is a chain of craters that continue in a roughly linear formation until reaching Mare Imbrium.

Only the northwestern rim of Stadius remains nearly intact, and it joins with a north-running ridge line that reaches the western rampart of Eratosthenes. The remainder of the formation forms a ghostly trace of the original rim, created from a few rises in the surface, and there is no indication of a central peak. The flat crater floor is pock-marked by craterlets, many of which were generated by secondary impacts from the creation of Copernicus.

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 Stadius.

Popular culture Within the Sega CD RPG Lunar: The Silver Star (and all subsequent remakes) there is a region called the Stadius Zone, which is named after the Stadius crater.

References

Sources

External links

Stadius at The Moon Wiki Wood, Chuck (September 28, 2004). "Unknown Luna 19". Lunar Photo of the Day. Archived from the original on 2008-11-20. Retrieved 2017-10-06. - featuring three released photos from Luna 19 from 1971 - it includes Stadius in the third one Wood, Chuck (March 24, 2005). "Floods and Buckshot". Lunar Photo of the Day. Archived from the original on 2012-08-28. Retrieved 2017-09-22. Wood, Chuck (January 26, 2007). "Before and After". Lunar Photo of the Day. Archived from the original on June 14, 2011.

Illustrations

Stadius (crater): Location map of Stadius in the Nearside of the Moon — Location map of Stadius in the Nearside of the Moon

Worked examples

Example 1 — a first encounter with Stadius (crater)

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

In research: Stadius (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 Stadius (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: Stadius (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ11 quadrangle, so understanding it makes those chapters shorter.
In everyday life: Look for Stadius (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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Stadius (crater)” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Stadius (crater) in 20 minutes

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

Frequently asked questions

What is Stadius (crater) in simple terms?

Stadius is a ghostly remnant of an ancient lunar impact crater that has been nearly obliterated by basaltic lava flows. It was named after Flemish astronomer Johannes Stadius.

Why does Stadius (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 Stadius (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 Stadius (crater).