astronomy

IC 923

IC 923 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 IC 923 rather than just read about it. In short: IC 923 is a lenticular galaxy located in Ursa Major. Its redshift is 0.069243 which means the galaxy is 954 million light-years from Earth.

Key takeaways

IC 923 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IC 923 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IC 923 from memory before moving on to harder problems.

Reference excerpt

IC 923 is a lenticular galaxy located in Ursa Major. Its redshift is 0.069243 which means the galaxy is 954 million light-years from Earth. IC 923 has apparent dimensions of 0.50 x 0.2 arcmin, meaning it is approximately 139,000 light-years across. IC 923 was discovered in June 1892, by Edward Emerson Barnard and is a member of galaxy group V1CG 588.

References

Illustrations

Worked examples

Example 1 — a first encounter with IC 923

Start with the simplest possible case. Write down what IC 923 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 IC 923 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 IC 923 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 IC 923

In research: IC 923 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 IC 923 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: IC 923 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1892, Discoveries by Edward Emerson Barnard, IC objects, so understanding it makes those chapters shorter.
In everyday life: Look for IC 923 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 IC 923 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IC 923 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 IC 923 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IC 923 in simple terms?

IC 923 is a lenticular galaxy located in Ursa Major. Its redshift is 0.069243 which means the galaxy is 954 million light-years from Earth.

Why does IC 923 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 IC 923?

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 IC 923.