astronomy

NGC 70

NGC 70 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 70 rather than just read about it. In short: NGC 70 is a spiral galaxy located in the constellation Andromeda. It was discovered on October 7, 1855, by R.

Key takeaways

NGC 70 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 70 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 70 from memory before moving on to harder problems.

Reference excerpt

NGC 70 is a spiral galaxy located in the constellation Andromeda. It was discovered on October 7, 1855, by R. J. Mitchell and was observed on December 19, 1897, by Guillaume Bigourdan from France who described it as "extremely faint, very small, round, between 2 faint stars". NGC 70 hosts a Seyfert Type II Active galactic nucleus (AGN). NGC 70 is a member of a compact group of seven or eight galaxies, sometimes called the NGC 70 Group or the VV 166 Group. The group comprises three relatively bright galaxies: 70, 71 and 72 in the NGC catalog, and four fainter galaxies. NGC 68 appears to be a group member, but its discrepant radial velocity and lack of tidal distortion suggest that it may be an unrelated galaxy along the group's line of sight. In photographs, the NGC 70 group resembles the much more famous Stephan's Quintet group, and it is a popular target for amateur astrophotographers.

References

External links Media related to NGC 70 at Wikimedia Commons

Illustrations

NGC 70: NGC 70 (near-infrared) — NGC 70 (near-infrared)

Worked examples

Example 1 — a first encounter with NGC 70

Start with the simplest possible case. Write down what NGC 70 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 70 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 70 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 70

In research: NGC 70 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 70 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 70 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Andromeda (constellation), Arp objects, Astronomical objects discovered in 1784, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 70 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 70 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 70 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 70 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 70 in simple terms?

NGC 70 is a spiral galaxy located in the constellation Andromeda. It was discovered on October 7, 1855, by R.

Why does NGC 70 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 70?

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 70.