astronomy

NGC 3746

NGC 3746 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 3746 rather than just read about it. In short: NGC 3746 is a large barred spiral galaxy with a ring structure located in the Leo constellation. It is located 449 million light-years from the Solar System and has an approximate diameter of 45,000 light-years.

Key takeaways

NGC 3746 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 3746 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 3746 from memory before moving on to harder problems.

Reference excerpt

NGC 3746 is a large barred spiral galaxy with a ring structure located in the Leo constellation. It is located 449 million light-years from the Solar System and has an approximate diameter of 45,000 light-years. NGC 3746 was discovered by Ralph Copeland on 9 February 1874 with subsequent observations made by Hermann Kobold, Lawrence Parsons and John Louis Emil Dreyer. The luminosity class of NGC 3746 is II and it has a broad H II region with a recessed core (RET).

Copeland Septet

NGC 3746 is a member of the Copeland Septet which comprises 7 galaxies discovered by Copeland in 1874. The other 6 members are NGC 3745, NGC 3748, NGC 3750, NGC 3751, NGC 3753, and NGC 3754. Together, they are known as Hickson 57 and Arp 320.

Supernovae Two supernovae have been discovered in NGC 3746:

SN 2002ar (Type Ia, mag. 16.5) was discovered by Dr W. D. Li from the University of California, Berkeley via unfiltered CCD images which was taken by the 0.8-m Katzman Automatic Imagining Telescope on 3 and 4 February 2002. It was located 3".3 east and 0".5 south of the nucleus. SN 2005ba (Type II, mag. 17.5) was discovered on 1 April 2005 by Norwegian scientists Arne Danielsen, Mikkel Steine, and Stale Kildahl via unfiltered images taken from a 'Celestron 14' reflector at Veggli, Norway. It was located 14".6 west and 4".0 north of the nucleus.

References

Illustrations

Worked examples

Example 1 — a first encounter with NGC 3746

Start with the simplest possible case. Write down what NGC 3746 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 3746 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 3746 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 3746

In research: NGC 3746 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 3746 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 3746 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arp objects, Astronomical objects discovered in 1874, Barred spiral galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 3746 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 3746 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 3746 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 3746 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 3746 in simple terms?

Why does NGC 3746 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 3746?

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 3746.