astronomy

NGC 7734

NGC 7734 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 7734 rather than just read about it. In short: NGC 7734 is a barred spiral galaxy located in the southern constellation of Tucana. The redshift of the galaxy is (z) 0.035 and it was first discovered by an English astronomer named John Herschel on November 2, 1834, who described it as a faint small object.

Key takeaways

NGC 7734 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 7734 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 7734 from memory before moving on to harder problems.

Reference excerpt

NGC 7734 is a barred spiral galaxy located in the southern constellation of Tucana. The redshift of the galaxy is (z) 0.035 and it was first discovered by an English astronomer named John Herschel on November 2, 1834, who described it as a faint small object. This galaxy makes up part of an interacting trio of galaxies alongside NGC 7733 with an estimated separation of around 48.3 kiloparsecs from each other.

Description NGC 7734 is a spiral galaxy of type (R')SB(r)pec morphology with ring features and a total stellar mass of 64.6 × 1010 M☉. It is classified to be a type 2 Seyfert galaxy and forms an interacting pair with the nearby barred spiral galaxy NGC 7733, connected via a tidal bridge. When observed, it is found to contain clusters of mainly old reddened stars, suggesting the lack of recent signs of any star formation activity due to strong gravitational interactions, while NGC 7733 displays young star forming regions. The black hole mass of NGC 7734 is estimated to be around 0.90–3.18 × 108 M☉. A study published in 2021 has confirmed NGC 7734 and NGC 7733 are no longer an interacting pair and could be an interacting trio, given the knot feature on the northwest side of NGC 7733 was reclassified to be a bulge component of another separate galaxy called NGC 7733N, which appears redshifted by around 650 kilometers per seconds and is also taking part in the interaction. The nucleus of NGC 7734 is also revealed to be active and as such contains a low ionization nuclear emission-region (LINER) that is located from the position of its central region. In 2025, it was determined NGC 7734 has a central feature present that bears a resemblance to both a disk and spiral arm structures that are located on the outer part of the galaxy. It also has a classical bulge that has a radius of about 230 parsecs and also a secondary bulge appearing as disk-like with an approximate radius of 1.15 kiloparsecs. The stellar bar feature of the galaxy contains young stars aged around 100 million years. The position angle of the bar is estimated to be 22.48° ± 0.79°.

References

External links NGC 7734 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 7734

Start with the simplest possible case. Write down what NGC 7734 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 7734 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 7734 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 7734

In research: NGC 7734 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 7734 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 7734 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1834, Barred spiral galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 7734 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 7734 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 7734 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 7734 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 7734 in simple terms?

Why does NGC 7734 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 7734?

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 7734.