astronomy

NGC 2937

NGC 2937 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 2937 rather than just read about it. In short: NGC 2937 is an elliptical galaxy located in the constellation Hydra. Its velocity relative to the cosmic microwave background is ~ 6,713 km/s, which corresponds to a Hubble distance of 105.1 ± 7.4 Mpc (~343 million ly).

Key takeaways

NGC 2937 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 2937 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2937 from memory before moving on to harder problems.

Reference excerpt

NGC 2937 is an elliptical galaxy located in the constellation Hydra. Its velocity relative to the cosmic microwave background is ~ 6,713 km/s, which corresponds to a Hubble distance of 105.1 ± 7.4 Mpc (~343 million ly). NGC 2937 was discovered by German astronomer Albert Marth in 1864. NGC 2937 is in a strong gravitational interaction with its neighbor NGC 2936, a peculiar spiral galaxy. This interaction has given the latter an appearance that is far from that of a spiral galaxy. The shape of NGC 2936 has earned it the nickname of the "porpoise galaxy". Together, these two galaxies appear in Halton Arp's Atlas of Peculiar Galaxies under the code Arp 142. Halton Arp uses them as an example from an elliptical galaxy. This pair of galaxies also appears in the Catalog of Collisional Ring Galaxies by Madore, Nelson and Petrillo.

Image gallery

See also List of NGC objects (2001–3000)

References

External links NGC 2937 at NASA/IPAC NGC 2937 at SIMBAD NGC 2937 at LEDA

Sources Tully, R. Brent (2015-04-28). "Galaxy Groups: A 2MASS Catalog". The Astronomical Journal. 149 (5): 171. arXiv:1503.03134. Bibcode:2015AJ....149..171T. doi:10.1088/0004-6256/149/5/171. ISSN 1538-3881. Gil de Paz, Armando; Boissier, Samuel; Madore, Barry F.; Seibert, Mark; Joe, Young H.; Boselli, Alessandro; Wyder, Ted K.; Thilker, David; Bianchi, Luciana; Rey, Soo-Chang; Rich, R. Michael; Barlow, Tom A.; Conrow, Tim; Forster, Karl; Friedman, Peter G.; Martin, D. Christopher; Morrissey, Patrick; Neff, Susan G.; Schiminovich, David; Small, Todd; Donas, Jose; Heckman, Timothy M.; Lee, Young-Wook; Milliard, Bruno; Szalay, Alex S.; Yi, Sukyoung (2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". The Astrophysical Journal Supplement Series. 173 (2): 185–255. arXiv:astro-ph/0606440. Bibcode:2007ApJS..173..185G. doi:10.1086/516636. ISSN 0067-0049. Gottlieb S. (May 2017). "Galaxies in Collision". Sky & Telescope. 133 (5): 28–29. Bibcode:2017S&T...133e..28G. ISSN 0037-6604.

Illustrations

Worked examples

Example 1 — a first encounter with NGC 2937

Start with the simplest possible case. Write down what NGC 2937 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 2937 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 2937 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 2937

In research: NGC 2937 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 2937 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 2937 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Discoveries by Albert Marth, Elliptical galaxies, Elliptical galaxy stubs, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2937 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 2937 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2937 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 2937 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2937 in simple terms?

Why does NGC 2937 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 2937?

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 2937.