astronomy

NGC 7214

NGC 7214 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 7214 rather than just read about it. In short: NGC 7214 is a large barred spiral galaxy located in the southern constellation of Piscis Austrinus. The redshift of the galaxy is (z) 0.023 and it was first discovered by the British astronomer John Herschel in July 1834, who described the object as a possible globular cluster with an irregular center.

Key takeaways

NGC 7214 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 7214 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 7214 from memory before moving on to harder problems.

Reference excerpt

NGC 7214 is a large barred spiral galaxy located in the southern constellation of Piscis Austrinus. The redshift of the galaxy is (z) 0.023 and it was first discovered by the British astronomer John Herschel in July 1834, who described the object as a possible globular cluster with an irregular center. It is the brightest and largest member of the four galaxies in the Hickson 91 galaxy group known as the NGC 7214 group. This galaxy is also classified as an active Seyfert galaxy of type 1 or type 1.2.

Description NGC 7214 is categorized as a late-type face-on spiral galaxy of type SBc. The rotation curve for this galaxy is described as both irregular and asymmetric. The central nucleus has a bright appearance, with spiral arms that are also bright on the inner side and much fainter outer spiral arms that are extended. The nuclear emission region has a compact appearance with a weak H II region that is located in the east. NGC 7214 is undergoing an interaction with a smaller spiral galaxy companion (HCG 91c), given the presence of a large prominent tidal tail extending from it. The tail structure has two components that point towards the northeast. The tail also contains star forming regions, given the traces of Hydrogen-alpha knots. One of the spiral arms on the southern side is shown to have constant velocity likely caused through streaming motions by the interactions. The central nucleus is surrounded by several H II regions having either moderate or weak signs of star formation.

References

External links NGC 7214 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Illustrations

Worked examples

Example 1 — a first encounter with NGC 7214

Start with the simplest possible case. Write down what NGC 7214 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 7214 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 7214 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 7214

In research: NGC 7214 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 7214 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 7214 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1834, Barred spiral galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 7214 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 7214 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 7214 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 7214 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 7214 in simple terms?

Why does NGC 7214 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 7214?

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 7214.