astronomy

NGC 662

NGC 662 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 662 rather than just read about it. In short: NGC 662 is a spiral galaxy in the constellation of Andromeda. Its velocity with respect to the cosmic microwave background is 5,397 ± 18 km/s, which corresponds to a Hubble distance of 79.6 ± 5.6 Mpc (~260 million light-years).

Key takeaways

NGC 662 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 662 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 662 from memory before moving on to harder problems.

Reference excerpt

NGC 662 is a spiral galaxy in the constellation of Andromeda. Its velocity with respect to the cosmic microwave background is 5,397 ± 18 km/s, which corresponds to a Hubble distance of 79.6 ± 5.6 Mpc (~260 million light-years). It was discovered by French astronomer Édouard Stephan on 22 November 1884. According to the Simbad database, NGC 662 is a radio galaxy. It features a broad HI line and is classified a field galaxy, meaning it does not belong to the galaxy group nor a cluster and is therefore gravitationally isolated.

Supernovae Three supernovae have been observed in NGC 662:

SN 2001dn (Type Ia, mag. 15.5) was discovered by Tom Boles on 14 August 2001. SN 2022ojo (Type II-P, mag. 16.938) was discovered by ATLAS on 5 July 2022. SN 2024pcw (Type II, mag. 18.724) was discovered by ATLAS on 8 July 2024.

Illustrations

Worked examples

Example 1 — a first encounter with NGC 662

Start with the simplest possible case. Write down what NGC 662 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 662 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 662 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 662

In research: NGC 662 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 662 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 662 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Andromeda (constellation), Astronomical objects discovered in 1884, Discoveries by Édouard Stephan, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 662 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 662 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 662 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 662 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 662 in simple terms?

Why does NGC 662 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 662?

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 662.