science

NGC 4349

NGC 4349 is a science 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 4349 rather than just read about it. In short: NGC 4349 is an open cluster in the constellation Crux. It was discovered by James Dunlop in 1826.

Key takeaways

NGC 4349 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NGC 4349 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 4349 from memory before moving on to harder problems.

Reference excerpt

NGC 4349 is an open cluster in the constellation Crux. It was discovered by James Dunlop in 1826. It is located approximately 7,000 light years away from Earth.

Characteristics There are 390 probable member stars within the angular radius of the cluster and 129 within the central part of the cluster. The tidal radius of the cluster is 17.8 - 22.8 parsecs (58 - 75 light years) and represents the average outer limit of NGC 4349, beyond which a star is unlikely to remain gravitationally bound to the cluster core. One blue straggler has been detected in the cluster. There are four Cepheid variables in the direction of the cluster, among them R and T Crucis, which, however, are not members of the cluster. R Crucis lies 16 arcminutes from the centre of the open cluster NGC 4349, which is beyond the outer limit of the cluster, and is estimated to be nearly 1 kpc closer to Earth than the cluster. The cluster has subsolar metallicity (−0.12 ± 0.06). The giant star NGC 4349 No. 127 (vmag. 10.82 and with mass 3.0 M☉) displays periodic radial velocity variations caused by intrinsic stellar variability, formerly thought to be caused by an orbiting brown dwarf companion.

References

External links

NGC 4349 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 4349

Start with the simplest possible case. Write down what NGC 4349 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 4349 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 4349 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 4349

In research: NGC 4349 appears in science 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 4349 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 4349 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Crux, NGC objects, Open clusters, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 4349 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 4349 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 4349 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 4349 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 4349 in simple terms?

NGC 4349 is an open cluster in the constellation Crux. It was discovered by James Dunlop in 1826.

Why does NGC 4349 matter?

Because it connects several science 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 4349?

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 4349.