astronomy

NGC 7280

NGC 7280 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 7280 rather than just read about it. In short: NGC 7280 is a lenticular galaxy in the constellation Pegasus. The galaxy lies about 75 million light years away from Earth, which means, given its apparent dimensions, that NGC 7280 is approximately 50,000 light years across.

Key takeaways

NGC 7280 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 7280 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 7280 from memory before moving on to harder problems.

Reference excerpt

NGC 7280 is a lenticular galaxy in the constellation Pegasus. The galaxy lies about 75 million light years away from Earth, which means, given its apparent dimensions, that NGC 7280 is approximately 50,000 light years across. It was discovered by William Herschel on October 15, 1784. NGC 7280 is a lenticular galaxy which is noted for having an inner gaseous polar ring. Dust lanes or rings are visible around the nucleus perpendicular to the major axis of the galaxy. The stellar population in the nucleus is younger than the surrounding area, with an estimated age of 1.5 ± 0.5 billion years, and has higher metallicity. A circumnuclear stellar disk about 1 arcsecond across has been detected by the Hubble Space Telescope. The galaxy also features an intermediate bar. Beyond the central region the gas and stars counter-rotate. The gas is also asymmetrically distributed. The gas was probably accreted recently because it exhibits shock-wave excitation. There is no active star formation detectable and there is no H-alpha emission from the nucleus. The galaxy is rich in hydrogen, with an estimated hydrogen mass of 109 M☉. NGC 7280 is the foremost galaxy of the NGC 7280 Group, along with PGC 141021, UGCA 429, and UGC 12090. NGC 7280 interacts with UGCA 429, which lies 3.8 arcminutes away, as there is a hydrogen tail extending from the opposite side from NGC 7280.

Gallery

References

External links

NGC 7280 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images NGC 7280 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with NGC 7280

Start with the simplest possible case. Write down what NGC 7280 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 7280 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 7280 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 7280

In research: NGC 7280 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 7280 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 7280 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1784, Discoveries by William Herschel, Lenticular galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 7280 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.

Affiliate

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

How to study NGC 7280 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 7280 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 7280 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 7280 in simple terms?

Why does NGC 7280 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 7280?

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 7280.