astronomy

NGC 7611

NGC 7611 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 7611 rather than just read about it. In short: NGC 7611 is a lenticular galaxy located in the constellation of Pisces. Its velocity relative to the cosmic microwave background is 2,881 ± 32 km/s, which corresponds to a Hubble distance of 42.5 ± 3.0 Mpc (~139 million light- years).

Key takeaways

NGC 7611 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 7611 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 7611 from memory before moving on to harder problems.

Reference excerpt

NGC 7611 is a lenticular galaxy located in the constellation of Pisces. Its velocity relative to the cosmic microwave background is 2,881 ± 32 km/s, which corresponds to a Hubble distance of 42.5 ± 3.0 Mpc (~139 million light- years). NGC 7611 was discovered by the Prussian astronomer Heinrich Louis d'Arrest on September 21, 1862

NGC 7619 Group According to A.M. Garcia, NGC 7611 is a member of the NGC 7619 group. He states that this group of galaxies contains at least 25 members. However, according to a more recent article published by Levy and colleagues in 2007, Some galaxies included by Garcia are also part of a group of galaxies located in the center of the Pegasus I cluster. According to the article, this group contains 30 galaxies. The galaxy NGC 7611 is on Garcia's list. Sengupta et al. also mention this group in an article published in 2006. They include only 17 galaxies, all X-ray emitters, including NGC 7611, but these are found either in Garcia's list or Levy's list, and often in both, with the exception of KUG 2318+079B. The galaxy CGCG 406-086 is another designation for KUG 2318+079B, which is in Levy's list. Similarly, the designation Z406-086 is the galaxy CGCG 406-086. Adding the galaxy KUG 2318+079B brings the total to at least 43 members for this group. However, the galaxy designated as [OB97] P05-6 in Levy's list is not found in any of the sources consulted. The calculation of the group's average distance therefore took into account 42 galaxies. Abraham Mahtessian also mentions the existence of this group, but all the galaxies he includes in it are also in Garcia's list.

References

Illustrations

Worked examples

Example 1 — a first encounter with NGC 7611

Start with the simplest possible case. Write down what NGC 7611 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 7611 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 7611 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 7611

In research: NGC 7611 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 7611 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 7611 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Lenticular galaxies, NGC objects, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 7611 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 7611 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 7611 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 7611 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 7611 in simple terms?

Why does NGC 7611 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 7611?

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 7611.