science

WISE J2209+2711

WISE J2209+2711 is a science 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 WISE J2209+2711 rather than just read about it. In short: WISE J2209+2711 (WISE J220905.73+271143.9) is a brown dwarf of spectral type Y0:, located in constellation Pegasus at 22 light-years from Earth. Its discovery was published in 2014 by Cushing et al.

Key takeaways

WISE J2209+2711 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect WISE J2209+2711 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WISE J2209+2711 from memory before moving on to harder problems.

Reference excerpt

WISE J2209+2711 (WISE J220905.73+271143.9) is a brown dwarf of spectral type Y0:, located in constellation Pegasus at 22 light-years from Earth. Its discovery was published in 2014 by Cushing et al.

Physical properties WISE J2209+2711 is one of a few Y-dwarfs observed with the NIRSpec and MIRI instruments aboard the James Webb Space Telescope. The modelling re-produced the spectrum with an excellent fit using phosphine-free and diabatic models. The excellent fit was achieved with a model that used an effective temperature of 350 K (77 °C; 170 °F) and a surface gravity of 104 cgs. This corresponds to a 5 MJ object with an age of 800 Myr. An atmospherical retrieval of WISE J2209+1711's spectral energy distribution, collected by JWST's NIRSpec and MIRI instruments, derive a mass of 9 MJ, a radius of 1.06 RJ, an effective temperature of 350 K (77 °C; 170 °F) and a surface gravity of 104.28 cgs. The position of WISE J2209+2711 in the surface gravity-temperature diagram indicates an age close to two Gyr.

See also List of star systems within 20–25 light years List of Y-dwarfs

References

Illustrations

Worked examples

Example 1 — a first encounter with WISE J2209+2711

Start with the simplest possible case. Write down what WISE J2209+2711 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 WISE J2209+2711 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 WISE J2209+2711 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 WISE J2209+2711

In research: WISE J2209+2711 appears in science 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 WISE J2209+2711 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: WISE J2209+2711 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brown dwarf stubs, Pegasus (constellation), WISE objects, so understanding it makes those chapters shorter.
In everyday life: Look for WISE J2209+2711 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 WISE J2209+2711 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WISE J2209+2711 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 WISE J2209+2711 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WISE J2209+2711 in simple terms?

WISE J2209+2711 (WISE J220905.73+271143.9) is a brown dwarf of spectral type Y0:, located in constellation Pegasus at 22 light-years from Earth. Its discovery was published in 2014 by Cushing et al.

Why does WISE J2209+2711 matter?

Because it connects several science 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 WISE J2209+2711?

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 WISE J2209+2711.