astronomy

NGC 2280

NGC 2280 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 2280 rather than just read about it. In short: NGC 2280 is a spiral galaxy located in the constellation Canis Major. It is located at a distance of about 75 million light years from Earth, which, given its apparent dimensions, means that NGC 2280 is about 135,000 light years across.

Key takeaways

NGC 2280 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 2280 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2280 from memory before moving on to harder problems.

Reference excerpt

NGC 2280 is a spiral galaxy located in the constellation Canis Major. It is located at a distance of about 75 million light years from Earth, which, given its apparent dimensions, means that NGC 2280 is about 135,000 light years across. It was discovered by John Herschel on February 1, 1835.

Characteristics NGC 2280 has a small bright nucleus. The spiral arms emanate from the bulge and are narrow and of high surface magnitude in the inner part of the disk. At the outer disk the arms become broader and of lower surface magnitude and appear to have more knots. The east arm can be traced through ~540° while the west one fades after ~360°. The spiral pattern of the galaxy is undisturbed, with regular flow pattern and no evidence for a bar or oval distortion. In the nucleus of NGC 2280 lies a supermassive black hole whose mass is estimated to be between 4 and 15 million M☉ (106.88 ± 0.31 M☉) by measuring the galaxy's pitch angle.

Supernova One supernova has been observed in NGC 2280. SN 2001fz, a type II supernova, was discovered by the Beijing Astronomical Observatory Supernova Survey on November 15, 2001. It had a peak magnitude of 17.4.

Nearby galaxies NGC 2280 belongs to the NGC 2280 galaxy group, also known as LGG 138. Other members of the group are the possibly merging lenticular galaxies NGC 2292 and NGC 2293, NGC 2295, ESO 490−G010 and ESO 490−G045. Because of its large angular diameter, about one degree, the group was identified when redshift information were available, by Garcia et al. in 1993. Although there are some smaller galaxies near NGC 2280 that based on redshift could be its companions, there are no significant indications of recent interactions or tidal distortions, like warps. Gerard de Vaucouleurs had placed NGC 2280 in the same group with NGC 2139, NGC 2207, NGC 2217, and NGC 2223.

See also List of NGC objects (2001–3000)

References

External links

NGC 2280 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 2280

Start with the simplest possible case. Write down what NGC 2280 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 2280 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 2280 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 2280

In research: NGC 2280 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 2280 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 2280 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1835, Canis Major, Discoveries by John Herschel, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2280 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 2280 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2280 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 2280 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2280 in simple terms?

Why does NGC 2280 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 2280?

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 2280.