astronomy

NGC 2535

NGC 2535 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 2535 rather than just read about it. In short: NGC 2535 is an unbarred spiral galaxy in the constellation Cancer. Its velocity with respect to the cosmic microwave background is 4,313±15 km/s, which corresponds to a Hubble distance of 207.5 ± 14.5 Mly (63.61 ± 4.46 Mpc).

Key takeaways

NGC 2535 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 2535 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2535 from memory before moving on to harder problems.

Reference excerpt

NGC 2535 is an unbarred spiral galaxy in the constellation Cancer. Its velocity with respect to the cosmic microwave background is 4,313±15 km/s, which corresponds to a Hubble distance of 207.5 ± 14.5 Mly (63.61 ± 4.46 Mpc). However, nine non-redshift measurements give a much closer mean distance of 88.46 ± 19.31 Mly (27.121 ± 5.922 Mpc). It was discovered on 22 January 1877 by French astronomer Édouard Stephan. NGC 2535 is exhibiting a weak inner ring structure around the nucleus that is interacting with NGC 2536. The interaction has warped the disk and spiral arms of NGC 2535, producing an elongated structure, visible at ultraviolet wavelengths, that contain many bright, recently formed blue star clusters in addition to enhanced star forming regions around the galaxy center. The two galaxies are listed together as Arp 82 in the Atlas of Peculiar Galaxies as an example of a spiral galaxy with a high surface brightness companion.

Supernova One supernova has been observed in NGC 2535. SN 1901A (type unknown, mag. 14.7) was seen by Karl Reinmuth on a photographic plate taken on 10 January 1901, although the discovery was not made until 28 September 1923.

See also NGC 2536 List of NGC objects (2001–3000)

References

External links Media related to NGC 2535 at Wikimedia Commons Spitzer Space Telescope page on NGC 2535

Illustrations

Worked examples

Example 1 — a first encounter with NGC 2535

Start with the simplest possible case. Write down what NGC 2535 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 2535 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 2535 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 2535

In research: NGC 2535 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 2535 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 2535 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arp objects, Astronomical objects discovered in 1877, Cancer (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2535 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 2535 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2535 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 2535 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2535 in simple terms?

Why does NGC 2535 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 2535?

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 2535.