science

NGC 1245

NGC 1245 is a science 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 1245 rather than just read about it. In short: NGC 1245 is an open cluster of stars in the northern constellation of Perseus. It was discovered by William Herschel on 11 December 1786.

Key takeaways

NGC 1245 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NGC 1245 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 1245 from memory before moving on to harder problems.

Reference excerpt

NGC 1245 is an open cluster of stars in the northern constellation of Perseus. It was discovered by William Herschel on 11 December 1786. It is located 3° southwest of alpha Persei and can be spotted with 10x50 binoculars. The cluster is nearly 1 billion years old. NGC 1245 has about 200 members the brightest of which are of 12th magnitude. The cluster shows evidence of mass segregation and it is possible that it has lost its lower mass members. Lying at a distance of 3kpc, the cluster is estimated to be 27 light years across.

References

External links Media related to NGC 1245 at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with NGC 1245

Start with the simplest possible case. Write down what NGC 1245 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 1245 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 1245 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 1245

In research: NGC 1245 appears in science 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 1245 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 1245 is common in secondary-school and first-year university syllabi. It links to neighbouring topics NGC objects, Open clusters, Perseus (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for NGC 1245 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 1245 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 1245 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 1245 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 1245 in simple terms?

NGC 1245 is an open cluster of stars in the northern constellation of Perseus. It was discovered by William Herschel on 11 December 1786.

Why does NGC 1245 matter?

Because it connects several science 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 1245?

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 1245.