astronomy

NGC 1023

NGC 1023 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 1023 rather than just read about it. In short: NGC 1023 is a barred lenticular galaxy in the northern constellation of Perseus. Alternatively, it is known as the Perseus Lenticular Galaxy.

Key takeaways

NGC 1023 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 1023 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 1023 from memory before moving on to harder problems.

Reference excerpt

NGC 1023 is a barred lenticular galaxy in the northern constellation of Perseus. Alternatively, it is known as the Perseus Lenticular Galaxy. Distance measurements vary from 9.3 to 19.7 million parsecs (30 to 64 million light-years), where it is a member of the NGC 1023 group of galaxies in the Local Supercluster. NGC 1023 is included in Halton Arp's Atlas of Peculiar Galaxies, under the category "Galaxies with Nearby Fragments" under the number 135. NGC 1023 has been estimated to have about 490 globular clusters, consistent with similar early-type galaxies. There is a supermassive black hole at the core with a mass of (4.4±0.5)×107 M☉. The black hole was discovered by analyzing the dynamics of the galaxy. A number of small galaxies have been found around NGC 1023, the collection of which is labelled the "NGC 1023 Group." The shape and motion of the neutral hydrogen gas around NGC 1023 suggest that it underwent a tidal interaction with one of its dwarf companions some time in the past. NGC 1023 has a satellite galaxy named NGC 1023A, which is a Magellanic spiral galaxy; its globular cluster system is much smaller, estimated to be around six individuals. A bridge of neutral hydrogen extends from NGC 1023 to NGC 1023A, which may indicate a possible interaction.

References

External links Media related to NGC 1023 at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with NGC 1023

Start with the simplest possible case. Write down what NGC 1023 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 1023 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 1023 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 1023

In research: NGC 1023 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 1023 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 1023 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arp objects, Barred lenticular galaxies, NGC 1023 Group, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 1023 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 1023 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 1023 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 1023 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 1023 in simple terms?

NGC 1023 is a barred lenticular galaxy in the northern constellation of Perseus. Alternatively, it is known as the Perseus Lenticular Galaxy.

Why does NGC 1023 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 1023?

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 1023.