astronomy

QSO J0931+3204

QSO J0931+3204 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 QSO J0931+3204 rather than just read about it. In short: QSO J0931+3204 is a type I seyfert galaxy, quasar, and elliptical galaxy in the constellation of Leo. The galaxy is at redshift z = 0.022551, equivalent to roughly 3.265 billion light years (1,000.97 megaparsecs) away and has an apparent visual magnitude of 18.76.

Key takeaways

QSO J0931+3204 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect QSO J0931+3204 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of QSO J0931+3204 from memory before moving on to harder problems.

Reference excerpt

QSO J0931+3204 is a type I seyfert galaxy, quasar, and elliptical galaxy in the constellation of Leo. The galaxy is at redshift z = 0.022551, equivalent to roughly 3.265 billion light years (1,000.97 megaparsecs) away and has an apparent visual magnitude of 18.76. It was discovered in 2003 in the HyperLEDA survey of over 950,000 galaxies.

Physical properties QSO J0931+3204 is a large elliptical galaxy and is in fact one of the largest galaxies discovered. The galaxy is 865,600 light years (265.38 kiloparsecs) across based on a distance of 3.265 billion light years (1,000.97 megaparsecs) and an angular diameter of 54.8 arcsecs. In the galactic center of QSO J0931+3204 is an extremely luminous quasar that has a luminosity of 2.04e+38 watts equal to 533.6 billion L☉. The galactic center contains a massive 100 million M☉ central black hole which is accreting on huge amounts of matter, which is ejecting mass amounts of gas outside the galaxy forming radio lobes. It is possible that QSO J0931+3204 has binary central black holes (BBHs), however this is unlikely. In 2020, it was discovered in the SAGAN survey that QSO J0931+3204 generated a 14.1 million light year (4.325 megaparsec) radio structure based on an angular diameter of 19.22 arcmin. At the time of discovery, QSO J0931+3204 was the largest giant radio quasar (GRQ) ever discovered however a newer 2023 article discovered a larger giant radio quasar designated FBQS J1318+2626 spanning 4.622 megaparsecs.

See also List of largest galaxies, includes QSO J0931+3204. 3C 236, similar-sized radio galaxy.

References

Illustrations

Worked examples

Example 1 — a first encounter with QSO J0931+3204

Start with the simplest possible case. Write down what QSO J0931+3204 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 QSO J0931+3204 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 QSO J0931+3204 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 QSO J0931+3204

In research: QSO J0931+3204 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 QSO J0931+3204 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: QSO J0931+3204 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 2003, Elliptical galaxies, LEDA objects, so understanding it makes those chapters shorter.
In everyday life: Look for QSO J0931+3204 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 QSO J0931+3204 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what QSO J0931+3204 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 QSO J0931+3204 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is QSO J0931+3204 in simple terms?

Why does QSO J0931+3204 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 QSO J0931+3204?

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 QSO J0931+3204.