astronomy

NGC 2008

NGC 2008 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 2008 rather than just read about it. In short: NGC 2008 is a distant spiral galaxy located in the constellation Pictor. Its speed relative to the cosmic microwave background is 10,367 ± 11 km/s, which corresponds to a Hubble distance of 153 ± 11 Mpc (~499 million ly).

Key takeaways

NGC 2008 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 2008 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2008 from memory before moving on to harder problems.

Reference excerpt

NGC 2008 is a distant spiral galaxy located in the constellation Pictor. Its speed relative to the cosmic microwave background is 10,367 ± 11 km/s, which corresponds to a Hubble distance of 153 ± 11 Mpc (~499 million ly). NGC 2008 was discovered by British astronomer John Herschel in 1834. The luminosity class of NGC 2008 is III with an apparent magnitude of 13.2. NGC 2008 is classified as a type Sc galaxy with a small central budge structure and open spiral arms. To date, four non-redshift measurements yield a distance of 135.750 ± 10.521 Mpc (~443 million ly), which is within the Hubble distance range. Note, however, that it is with the average value of independent measurements, when they exist, that the NASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 2008 could be approximately 77 kpc (~253,000 ly) if we used the Hubble distance to calculate it. According to Soares and his colleagues, NGC 2007 and NGC 2008 form a pair of galaxies. However, the Hubble distance of NGC 2007 is 67.57 ± 4.73 Mpc (~220 million ly). These two galaxies therefore form a purely optical pair.

See also List of NGC objects (2001–3000) New General Catalogue

External links NGC 2008 at NASA/IPAC NGC 2008 at SIMBAD

References

Illustrations

Worked examples

Example 1 — a first encounter with NGC 2008

Start with the simplest possible case. Write down what NGC 2008 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 2008 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 2008 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 2008

In research: NGC 2008 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 2008 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 2008 is common in secondary-school and first-year university syllabi. It links to neighbouring topics ESO objects, NGC objects, Pictor, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2008 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study NGC 2008 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2008 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 2008 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2008 in simple terms?

Why does NGC 2008 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 2008?

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 2008.