astronomy

NGC 2315

NGC 2315 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 2315 rather than just read about it. In short: NGC 2315 is a lenticular galaxy in the constellation of Lynx. Its velocity with respect to the cosmic microwave background is 6,369±60 km/s, which corresponds to a Hubble distance of 306.4 ± 21.8 Mly (93.94 ± 6.69 Mpc).

Key takeaways

NGC 2315 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 2315 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2315 from memory before moving on to harder problems.

Reference excerpt

NGC 2315 is a lenticular galaxy in the constellation of Lynx. Its velocity with respect to the cosmic microwave background is 6,369±60 km/s, which corresponds to a Hubble distance of 306.4 ± 21.8 Mly (93.94 ± 6.69 Mpc). It was discovered by British astronomer John Herschel on 16 February 1831. NGC 2315 is a radio galaxy, i.e. it has giant regions of radio emission extending well beyond its visible structure. It also has a possible active galactic nucleus, 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.

LDC 484 Group NGC 2315 is a member of a group of galaxies known as LDC 484. This group contains 47 galaxies, including NGC 2320, NGC 2321, NGC 2322, NGC 2326, NGC 2329, NGC 2332, NGC 2340, IC 458, and IC 465.

Supernova One supernova has been observed in NGC 2315:

SN 2011ay (Type Iax, mag. 17.8) was discovered by the Lick Observatory Supernova Search (LOSS) on 18 March 2011. It was initially classified as Type Ia-pec, but later anaylsis concluded that it was Type Iax.

See also List of NGC objects (2001–3000)

References

External links Media related to NGC 2315 at Wikimedia Commons NGC 2315 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 2315

Start with the simplest possible case. Write down what NGC 2315 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 2315 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 2315 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 2315

In research: NGC 2315 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 2315 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 2315 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1831, Discoveries by John Herschel, IRAS catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2315 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 2315 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2315 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 2315 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2315 in simple terms?

Why does NGC 2315 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 2315?

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 2315.