astronomy

NGC 4670

NGC 4670 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 4670 rather than just read about it. In short: NGC 4670 is a blue compact galaxy in the constellation Coma Berenices. The galaxy lies about 60 million light years away from Earth, which means, given its apparent dimensions, that NGC 4670 is approximately 25,000 light years across.

Key takeaways

NGC 4670 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 4670 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 4670 from memory before moving on to harder problems.

Reference excerpt

NGC 4670 is a blue compact galaxy in the constellation Coma Berenices. The galaxy lies about 60 million light years away from Earth, which means, given its apparent dimensions, that NGC 4670 is approximately 25,000 light years across. It was discovered by William Herschel on April 6, 1785.

Characteristics The overall shape of the galaxy is categorised as peculiar and it has been categorised as amorphous or as barred lenticular galaxy. NGC 4670 is included in the Atlas of Peculiar Galaxies in the galaxies with diffuse counter tails category. The gas kinematics indicate the presence of a central bar. The galaxy is seen with an 28° inclination but it is possibly warped. NGC 4670 is characterised by its blue color, which was noted by Guillermo Haro in a study published in 1956. Such galaxies are characterised by episodes of intense star formation. The centre of NGC 4670 hosts a supergiant HII region and also hosts most of the hydrogen of the galaxy. The hydrogen lies in three clouds with an estimated mass of 108 M☉. Four other HII regions are visible near the central region. The galaxy has also ionised gas outside of the central region, forming bubbles and filaments. The two larger filaments extend to the southwest and northeast and a have a calculated length of 7.5 and 6.5 kpc respectively. An X-ray and radio source has been detected in the galaxy at the location of a star cluster complex but its nature is uncertain. It could be a massive black hole, an ultraluminous X-ray bubble, an X-ray binary star or a supernova remnant.

Nearby galaxies NGC 4670 is considered to be a member of the NGC 4565 Group, which also includes, apart from NGC 4565, the galaxies NGC 4494, NGC 4562, NGC 4725, and NGC 4747.

References

External links

NGC 4670 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 4670

Start with the simplest possible case. Write down what NGC 4670 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 4670 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 4670 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 4670

In research: NGC 4670 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 4670 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 4670 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arp objects, Astronomical objects discovered in 1785, Barred lenticular galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 4670 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 4670 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 4670 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 4670 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 4670 in simple terms?

Why does NGC 4670 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 4670?

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 4670.