astronomy

NGC 2655

NGC 2655 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 2655 rather than just read about it. In short: NGC 2655 is a lenticular galaxy in the northern constellation of Camelopardalis. It is at a distance of 60 million light years from Earth.

Key takeaways

NGC 2655 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 2655 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2655 from memory before moving on to harder problems.

Reference excerpt

NGC 2655 is a lenticular galaxy in the northern constellation of Camelopardalis. It is at a distance of 60 million light years from Earth. NGC 2655 is a Seyfert galaxy. The galaxy has asymmetric dust lanes in the centre of the galaxy, tidal arms and extended neutral hydrogen gas and may have recently experienced a merger. The complex dynamics of the HI and optical tails suggest the galaxy may have undergone more mergers in the past. A weak bar has been detected in infrared H band. The diameter of the disk of the galaxy is estimated to be 60 Kpc (195,000 ly).

William Herschel discovered NGC 2655 in September 26, 1802 and described it as very bright and considerably large. The galaxy can be glimpsed with a 4-inch telescope under dark skies nearly 10° from the north celestial pole. NGC 2655 is the brightest member of the NGC 2655 group, which also contains the Sc galaxy NGC 2715, NGC 2591, and NGC 2748. One of the gas structures of NGC 2655 is trailing off toward the small galaxy UGC 4714.

Supernova One supernova has been observed in NGC 2655.

SN 2011B (Type Ia, mag. 15.8) was discovered by Kōichi Itagaki and Masaki Tsuboi on 7 January 2011.

References

External links Media related to NGC 2655 at Wikimedia Commons NGC 2655 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 2655

Start with the simplest possible case. Write down what NGC 2655 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 2655 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 2655 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 2655

In research: NGC 2655 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 2655 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 2655 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arp objects, Camelopardalis, IRAS catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2655 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 2655 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2655 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 2655 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2655 in simple terms?

NGC 2655 is a lenticular galaxy in the northern constellation of Camelopardalis. It is at a distance of 60 million light years from Earth.

Why does NGC 2655 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 2655?

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 2655.