astronomy

UGC 9425

UGC 9425 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 UGC 9425 rather than just read about it. In short: UGC 9425 (also known as Segner's Wheel) are a pair of interacting galaxies located in the constellation of Boötes, comprising PGC 52283 and PGC 87675, both disk-type galaxies. It is located 468 million light-years from Earth and catalogued as Arp 241 by Halton Arp.

Key takeaways

UGC 9425 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect UGC 9425 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of UGC 9425 from memory before moving on to harder problems.

Reference excerpt

UGC 9425 (also known as Segner's Wheel) are a pair of interacting galaxies located in the constellation of Boötes, comprising PGC 52283 and PGC 87675, both disk-type galaxies. It is located 468 million light-years from Earth and catalogued as Arp 241 by Halton Arp.

Supernova One supernova was discovered in UGC 9425 by W.D. Li from the University of California via unfiltered images taken from the Katzman Automatic Imaging Telescope. Designated SN 2001ck, the supernova was located 5".8 west and 3".0 north of the nucleus. Further investigations by astronomers from Harvard Smithsonian Center for Astrophysics, confirmed it as a Type Ia supernova with an expansion velocity of 11,000 kilometers per second.

References

Illustrations

Worked examples

Example 1 — a first encounter with UGC 9425

Start with the simplest possible case. Write down what UGC 9425 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 UGC 9425 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 UGC 9425 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 UGC 9425

In research: UGC 9425 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 UGC 9425 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: UGC 9425 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arp objects, Boötes, Interacting galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for UGC 9425 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 UGC 9425 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what UGC 9425 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 UGC 9425 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is UGC 9425 in simple terms?

Why does UGC 9425 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 UGC 9425?

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 UGC 9425.