astronomy

NGC 2342

NGC 2342 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 2342 rather than just read about it. In short: NGC 2342 is a spiral galaxy in the constellation of Gemini. Its velocity with respect to the cosmic microwave background is 5445 ± 11 km/s, which corresponds to a Hubble distance of 80.31 ± 5.62 Mpc (~262 million light-years).

Key takeaways

NGC 2342 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 2342 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2342 from memory before moving on to harder problems.

Reference excerpt

NGC 2342 is a spiral galaxy in the constellation of Gemini. Its velocity with respect to the cosmic microwave background is 5445 ± 11 km/s, which corresponds to a Hubble distance of 80.31 ± 5.62 Mpc (~262 million light-years). It was discovered by German astronomer Albert Marth on 10 November 1864. NGC 2342 is a luminous infrared galaxy (LIRG). Together with NGC 2341, they both form a gravitationally bound galaxy pair listed as HOLM 86.

Supernovae Two supernovae have been observed in NGC 2342:

SN 2023vck (Type Ib, mag 19.917) was discovered by the Zwicky Transient Facility on 15 October 2023. SN 2025aebt (Type Ib, mag. 19.173) was discovered by ATLAS on 17 November 2025.

See also List of NGC objects (2001–3000)

References

External links Media related to NGC 2342 at Wikimedia Commons NGC 2342 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 2342

Start with the simplest possible case. Write down what NGC 2342 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 2342 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 2342 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 2342

In research: NGC 2342 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 2342 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 2342 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1864, Discoveries by Albert Marth, Gemini (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2342 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 2342 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2342 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 2342 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2342 in simple terms?

Why does NGC 2342 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 2342?

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 2342.