astronomy

NGC 3673

NGC 3673 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 3673 rather than just read about it. In short: NGC 3673 is a barred spiral galaxy in the constellation Hydra. The galaxy lies about 75 million light years away from Earth, which means, given its apparent dimensions, that NGC 3673 is approximately 75,000 light years across.

Key takeaways

NGC 3673 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 3673 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 3673 from memory before moving on to harder problems.

Reference excerpt

NGC 3673 is a barred spiral galaxy in the constellation Hydra. The galaxy lies about 75 million light years away from Earth, which means, given its apparent dimensions, that NGC 3673 is approximately 75,000 light years across. It was discovered by John Herschel on March 22, 1836. The galaxy has a small, bright nucleus embedded in a bar, with distinctly blue color. The bar is weak and some darker areas are visible in it. The bar has X-shaped features. The bulge is weakly boxy. At the end of the bar a nearly complete ring is formed, measuring 1.5 by 0.7 arcminutes. From the ring emerge faint filamentary arms. The spiral pattern resembles more that of a grand design galaxy than a flocculent pattern. The star formation rate of the galaxy is estimated to be about 0.7 M☉ per year. In the centre of the galaxy lies a supermassive black hole, whose mass is estimated to be 107.01 ± 0.37 (4.4 - 24 millions) M☉, based on the pitch angle of the spiral arms. NGC 3673 is a relatively isolated galaxy. It belongs to the same galaxy cloud as NGC 3923, NGC 3717, NGC 3885, NGC 3904, and NGC 4105 and their groups.

References

External links

NGC 3673 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images NGC 3673 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with NGC 3673

Start with the simplest possible case. Write down what NGC 3673 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 3673 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 3673 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 3673

In research: NGC 3673 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 3673 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 3673 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1836, Barred spiral galaxies, Discoveries by John Herschel, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 3673 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 3673 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 3673 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 3673 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 3673 in simple terms?

Why does NGC 3673 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 3673?

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 3673.