science

Rahe (crater)

Rahe (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 Rahe (crater) rather than just read about it. In short: Rahe is a crater on the planet Mars in the Tharsis quadrangle, positioned at 25.05° north latitude and 262.52° east longitude, between the volcanoes Ceraunius Tholus and Uranius Tholus. It measures approximately 34 kilometers in diameter and was named after Jürgen Rahe, a German-American astronomer and NASA science program director.

Key takeaways

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

Reference excerpt

Rahe is a crater on the planet Mars in the Tharsis quadrangle, positioned at 25.05° north latitude and 262.52° east longitude, between the volcanoes Ceraunius Tholus and Uranius Tholus. It measures approximately 34 kilometers in diameter and was named after Jürgen Rahe, a German-American astronomer and NASA science program director.

Description The crater has an elongated shape measuring 35 km by 18 km and is the result of an oblique impact. A channel connects Rahe crater to the vicinity of the summit caldera of Ceraunius Tholus, with an interesting fan-shaped deposit at the lower end. Rahe crater is 1 km deep in places, and was created by a low angle impact which is evident by its elongated shape and ejecta deposit in the shape of a "butterfly". Rahe is believed to once have held a lake. The lake was formed because heat from the nearby volcano Ceraunius Tholus melted glaciers. Melt water first collected in the caldera of Cerunius Tholus, and then spilled over the caldera rim forming a valley and the lake in Rahe crater. The valley that carried the water was about 200 m wide. A delta formed where the valley entered the crater. This type of event involving volcanic heat melting glaciers is common in Iceland. Eruptions under glaciers are called jökulhlaups and average two each century. Studies of climate change show that many low-latitude regions accumulated large amounts of snow when the climate was different.

See also Climate of Mars Geology of Mars 3537 Jürgen § Naming, minor planet List of craters on Mars

References

Illustrations

Worked examples

Example 1 — a first encounter with Rahe (crater)

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

In research: Rahe (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 Rahe (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: Rahe (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on Mars, Tharsis quadrangle, so understanding it makes those chapters shorter.
In everyday life: Look for Rahe (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 “Rahe (crater)” →

Affiliate

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

How to study Rahe (crater) in 20 minutes

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

Frequently asked questions

What is Rahe (crater) in simple terms?

Why does Rahe (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 Rahe (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 Rahe (crater).