astronomy

NGC 4504

NGC 4504 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 4504 rather than just read about it. In short: NGC 4504 is a spiral galaxy in the constellation Virgo. The galaxy lies about 55 million light years away from Earth, which means, given its apparent dimensions, that NGC 4504 is approximately 70,000 light years across.

Key takeaways

NGC 4504 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 4504 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 4504 from memory before moving on to harder problems.

Reference excerpt

NGC 4504 is a spiral galaxy in the constellation Virgo. The galaxy lies about 55 million light years away from Earth, which means, given its apparent dimensions, that NGC 4504 is approximately 70,000 light years across. It was discovered by William Herschel on March 20, 1789. NGC 4504 has a point source nucleus embedded in a highly elliptical bulge. It is possible there is a small bar in the bulge. The galaxy has very low surface brightness arms emerging from the bulge. HII regions are visible in the disk, the largest of which are more than 3 arcseconds across. The star formation rate is estimated to be 0.45 M☉ per year based on the H-alpha emission. The galaxy has a small bar 0.36 arcminutes long and a ring with a diameter 0.93 arcminutes. In the nucleus of the galaxy lies a nuclear star cluster which has a radius of 4 arcseconds. NGC 4504 forms a pair with NGC 4487, which lies 35 arcminutes away. NGC 4504 is a member of the Messier 104 Group, which also includes the Sombrero Galaxy (M104), NGC 4487, UGCA 287, and UGCA 289. A. M. Garcia considers the galaxy part of the LGG 293 Group, in which are included the galaxies NGC 4487, NGC 4504, and NGC 4597. It is part of a Virgo II Groups, a chain of groups extending from the Virgo Cluster.

Gallery

References

External links

NGC 4504 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images NGC 4504 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with NGC 4504

Start with the simplest possible case. Write down what NGC 4504 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 4504 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 4504 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 4504

In research: NGC 4504 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 4504 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 4504 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1789, Discoveries by William Herschel, MCG objects, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 4504 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 4504 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 4504 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 4504 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 4504 in simple terms?

Why does NGC 4504 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 4504?

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 4504.