astronomy

NGC 3220

NGC 3220 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 3220 rather than just read about it. In short: NGC 3220 is a spiral galaxy located in the constellation Ursa Major. It was discovered by the German-born British astronomer William Herschel on 8 April 1793.

Key takeaways

NGC 3220 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 3220 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 3220 from memory before moving on to harder problems.

Reference excerpt

NGC 3220 is a spiral galaxy located in the constellation Ursa Major. It was discovered by the German-born British astronomer William Herschel on 8 April 1793. The galaxy was also observed by the American astronomer Lewis Swift on 8 August 1890 and was subsequently listed in the Index Catalogue as IC 604.

Characteristics Its velocity relative to the cosmic microwave background is 1320±11 km/s, corresponding to a Hubble distance of 63.6 ± 4.6 Mly (19.5 ± 1.4 Mpc). The luminosity class of NGC 3220 is II, and it exhibits a broad H I line.

NGC 3264 Group NGC 3220 is a galaxy that is bright in X-rays and is a member of the NGC 3264 group, which contains six galaxies. The five other members are NGC 3206, NGC 3264, NGC 3353, UGC 5848, and UGCA 211. The same group with the same galaxies was also identified in a study published by A. M. Garcia in 1993. NGC 3206 and NGC 3220 lie in the same region of the sky and, according to a study conducted by Abraham Mahtessian in 1988, they form a galaxy pair.

Illustrations

Worked examples

Example 1 — a first encounter with NGC 3220

Start with the simplest possible case. Write down what NGC 3220 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 3220 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 3220 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 3220

In research: NGC 3220 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 3220 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 3220 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1793, Discoveries by William Herschel, IC objects, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 3220 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 3220 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 3220 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 3220 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 3220 in simple terms?

NGC 3220 is a spiral galaxy located in the constellation Ursa Major. It was discovered by the German-born British astronomer William Herschel on 8 April 1793.

Why does NGC 3220 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 3220?

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 3220.