astronomy

NGC 1317

NGC 1317 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 1317 rather than just read about it. In short: NGC 1317 (also known as NGC 1318) is a barred spiral galaxy in the constellation Fornax, in the Fornax Cluster. It was discovered by Scottish astronomer James Dunlop on November 24, 1826.

Key takeaways

NGC 1317 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 1317 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 1317 from memory before moving on to harder problems.

Reference excerpt

NGC 1317 (also known as NGC 1318) is a barred spiral galaxy in the constellation Fornax, in the Fornax Cluster. It was discovered by Scottish astronomer James Dunlop on November 24, 1826. It appears to be interacting with the much larger NGC 1316, but uncertainty in distance estimates and scales of tidal distortions make this uncertain. It is a member of the NGC 1316 subgroup, part of the Fornax Cluster. Its size is 2.8' x 2.4' which, at the average distance, gives a diameter of 118,000 light-years.

Distance estimates

NGC 1317 has an uncertain distance. Based on redshift, the distance is 55.1 million light-years, but some other methods estimate a distance as large as 88.4 million light-years. The distance of this galaxy is therefore somewhere between 55 and 88 Mly, but its true distance is unknown. The average distance between the two estimates is around 70 million light-years, which means NGC 1317 is also in the Fornax Cluster.

References

External links Media related to NGC 1317 at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with NGC 1317

Start with the simplest possible case. Write down what NGC 1317 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 1317 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 1317 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 1317

In research: NGC 1317 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 1317 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 1317 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Barred spiral galaxies, Discoveries by James Dunlop, Fornax, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 1317 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 1317 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 1317 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 1317 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 1317 in simple terms?

NGC 1317 (also known as NGC 1318) is a barred spiral galaxy in the constellation Fornax, in the Fornax Cluster. It was discovered by Scottish astronomer James Dunlop on November 24, 1826.

Why does NGC 1317 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 1317?

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 1317.