astronomy

NGC 2672

NGC 2672 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 2672 rather than just read about it. In short: NGC 2672 is an elliptical galaxy in the constellation of Cancer. Its velocity with respect to the cosmic microwave background is 4,611±21 km/s, which corresponds to a Hubble distance of 221.8 ± 15.6 Mly (68.01 ± 4.77 Mpc).

Key takeaways

NGC 2672 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 2672 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2672 from memory before moving on to harder problems.

Reference excerpt

NGC 2672 is an elliptical galaxy in the constellation of Cancer. Its velocity with respect to the cosmic microwave background is 4,611±21 km/s, which corresponds to a Hubble distance of 221.8 ± 15.6 Mly (68.01 ± 4.77 Mpc). Additionally, 11 non-redshift measurements give a closer distance of 188.93 ± 19.72 Mly (57.927 ± 6.045 Mpc). It was discovered by German-British astronomer William Herschel on 14 March 1784. The SIMBAD database lists NGC 2672 as an Active Galaxy Nucleus Candidate, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars. NGC 2672 is listed with the galaxy NGC 2673 as Holm 99 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937. These two galaxies are also listed in Halton Arp's Atlas of Peculiar Galaxies as Arp 167, with the description "Comp. galaxy very condensed, has curved plume." Another study indicates that the two galaxies are interacting and NGC 2673 has two tidal plumes, while NGC 2672 is only weakly disturbed.

Supernovae Two supernovae have been observed in NGC 2672:

SN 1938B (type unknown, mag. 15.5) was discovered by Arno Wachmann in 1938. SN 2025yla (Type Ia-91bg-like, mag. 15.5) was discovered by the Zwicky Transient Facility on 18 January 2025.

Other observations On 29 January 1953 it was occulted by the Moon during a Total Lunar Eclipse (the January 1953 lunar eclipse) over the South Atlantic and extreme south of Africa.

See also List of NGC objects (2001–3000)

References

External links Media related to NGC 2672 at Wikimedia Commons NGC 2672 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Illustrations

Worked examples

Example 1 — a first encounter with NGC 2672

Start with the simplest possible case. Write down what NGC 2672 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 2672 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 2672 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 2672

In research: NGC 2672 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 2672 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 2672 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arp objects, Astronomical objects discovered in 1784, Cancer (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2672 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 2672 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2672 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 2672 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2672 in simple terms?

Why does NGC 2672 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 2672?

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 2672.