astronomy

SN 2213−1745

SN 2213−1745 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 SN 2213−1745 rather than just read about it. In short: SN 2213−1745 was an extremely remote superluminous supernova (SLSN), which occurred in between November 2004 and June 2005. It was discovered in Canada-France-Hawaii Telescope Legacy Survey data.

Key takeaways

SN 2213−1745 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SN 2213−1745 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SN 2213−1745 from memory before moving on to harder problems.

Reference excerpt

SN 2213−1745 was an extremely remote superluminous supernova (SLSN), which occurred in between November 2004 and June 2005. It was discovered in Canada-France-Hawaii Telescope Legacy Survey data. Its peak far-ultraviolet absolute magnitude reached −21.2, which was comparable to the total absolute magnitude of its host galaxy. The distance (redshift) to this supernova z=2.0458±0.0005 makes it one of the most remote supernovae observed as of 2012. The luminosity of SN 2213−1745 evolved slowly over several years as it was still detectable in November 2006. Both the high luminosity and slow decay indicate that the supernova's progenitor was a star with an initial mass as high as 250 solar masses. The supernova explosion itself may have been a pair-instability supernova similar to the SN 2007bi event, with which it shares many similarities. Observations of SN 2213−1745 imply that more than 3 solar masses of radioactive 56Ni may have been released by the star's explosion.

References

External links 12 Billion-Year Old Supernova Discovered by Astronomers Elemental origins glimpsed in 12 billion year old supernova

Illustrations

Worked examples

Example 1 — a first encounter with SN 2213−1745

Start with the simplest possible case. Write down what SN 2213−1745 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 SN 2213−1745 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 SN 2213−1745 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 SN 2213−1745

In research: SN 2213−1745 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 SN 2213−1745 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: SN 2213−1745 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aquarius (constellation), Astronomical objects discovered in 2005, Superluminous Supernovae, so understanding it makes those chapters shorter.
In everyday life: Look for SN 2213−1745 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 SN 2213−1745 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SN 2213−1745 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 SN 2213−1745 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SN 2213−1745 in simple terms?

SN 2213−1745 was an extremely remote superluminous supernova (SLSN), which occurred in between November 2004 and June 2005. It was discovered in Canada-France-Hawaii Telescope Legacy Survey data.

Why does SN 2213−1745 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 SN 2213−1745?

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 SN 2213−1745.