astronomy

NGC 6755

NGC 6755 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 6755 rather than just read about it. In short: NGC 6755 is an open cluster of stars in the equatorial constellation of Aquila, positioned about 3° to the east of the star Delta Aquilae. It was discovered by the Anglo-German astronomer William Herschel on July 30, 1785 and is located at a distance of 8,060 light years from the Sun.

Key takeaways

NGC 6755 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 6755 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 6755 from memory before moving on to harder problems.

Reference excerpt

NGC 6755 is an open cluster of stars in the equatorial constellation of Aquila, positioned about 3° to the east of the star Delta Aquilae. It was discovered by the Anglo-German astronomer William Herschel on July 30, 1785 and is located at a distance of 8,060 light years from the Sun. NGC 6756 lies 30′ to the northeast of NGC 6755, with the pair forming a visual double cluster. However, they probably do not form a binary cluster system since they have different ages and are too distant from each other. This cluster has a Trumpler class of II2r with a visual magnitude of 7.5 and it spans an angular size 15′. It has an estimated age of 250 million years, based on the main sequence turnoff. A total of 71 variable stars have been detected in the field of this cluster, of which 31 are eclipsing binaries, seven are pulsating variables, and 28 are most likely irregular variable red giants.

Gallery

References

External links Media related to NGC 6755 at Wikimedia Commons

NGC 6755 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 6755

Start with the simplest possible case. Write down what NGC 6755 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 6755 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 6755 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 6755

In research: NGC 6755 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 6755 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 6755 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aquila (constellation), NGC objects, Open clusters, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 6755 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 6755 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 6755 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 6755 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 6755 in simple terms?

Why does NGC 6755 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 6755?

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 6755.