astronomy

NGC 788

NGC 788 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 788 rather than just read about it. In short: NGC 788 is a lenticular galaxy located in the constellation Cetus. Its velocity with respect to the cosmic microwave background is 3938 ± 30 km/s, which corresponds to a Hubble distance of 189.4 ± 13.4 Mly (58.08 ± 4.10 Mpc).

Key takeaways

NGC 788 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 788 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 788 from memory before moving on to harder problems.

Reference excerpt

NGC 788 is a lenticular galaxy located in the constellation Cetus. Its velocity with respect to the cosmic microwave background is 3938 ± 30 km/s, which corresponds to a Hubble distance of 189.4 ± 13.4 Mly (58.08 ± 4.10 Mpc). It was discovered in a sky survey by Wilhelm Herschel on September 10, 1785. Studies of NGC 788 indicate that it, while itself being classified as a Seyfert 2, contains an obscured Seyfert 1 nucleus, following the detection of a broad Hα emission line in the polarized flux spectrum. The observation also indicated the lowest radio luminosities observed in an obscured Seyfert 1.

Supernova One supernova has been observed in NGC 788: SN 1998dj (Type Ia, mag. 16.1) was discovered by the Lick Observatory Supernova Search (LOSS) on 8 August 1998.

NGC 788 Group NGC 788 is the largest and brightest galaxy in a group of at least five galaxies that bears its name. The other four galaxies in the NGC 788 group (also known as LGG 44) are IC 183, NGC 829, NGC 830, and NGC 842.

Image gallery

Illustrations

Worked examples

Example 1 — a first encounter with NGC 788

Start with the simplest possible case. Write down what NGC 788 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 788 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 788 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 788

In research: NGC 788 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 788 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 788 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cetus (constellation), IRAS catalogue objects, Lenticular galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 788 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 788 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 788 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 788 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 788 in simple terms?

Why does NGC 788 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 788?

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 788.