astronomy

NGC 398

NGC 398 is a astronomy 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 NGC 398 rather than just read about it. In short: NGC 398 is a lenticular galaxy located in the constellation Pisces. It was discovered on October 28, 1886, by Guillaume Bigourdan.

Key takeaways

NGC 398 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NGC 398 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 398 from memory before moving on to harder problems.

Reference excerpt

NGC 398 is a lenticular galaxy located in the constellation Pisces. It was discovered on October 28, 1886, by Guillaume Bigourdan. It was described by Dreyer as "very faint, very small, stellar."

References

External links Media related to NGC 398 at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with NGC 398

Start with the simplest possible case. Write down what NGC 398 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 NGC 398 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 NGC 398 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 NGC 398

In research: NGC 398 appears in astronomy 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 NGC 398 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: NGC 398 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1886, Lenticular galaxy stubs, NGC objects, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 398 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 NGC 398 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 398 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 NGC 398 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 398 in simple terms?

NGC 398 is a lenticular galaxy located in the constellation Pisces. It was discovered on October 28, 1886, by Guillaume Bigourdan.

Why does NGC 398 matter?

Because it connects several astronomy 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 NGC 398?

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 NGC 398.