science

WISE 2220−3628

WISE 2220−3628 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 2220−3628 rather than just read about it. In short: WISE J222055.31−362817.4 (designation abbreviated to WISE 2220−3628) is a brown dwarf of spectral class Y0, located in constellation Grus at approximately 34.2 light-years from Earth. Discovery WISE 2220−3628 was discovered in 2012 by J.

Key takeaways

WISE 2220−3628 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 2220−3628 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WISE 2220−3628 from memory before moving on to harder problems.

Reference excerpt

WISE J222055.31−362817.4 (designation abbreviated to WISE 2220−3628) is a brown dwarf of spectral class Y0, located in constellation Grus at approximately 34.2 light-years from Earth.

Discovery WISE 2220−3628 was discovered in 2012 by J. Davy Kirkpatrick et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite—NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. In 2012 Kirkpatrick et al. published a paper in The Astrophysical Journal, where they presented discovery of seven new found by WISE brown dwarfs of spectral type Y, among which also was WISE 2220−3628.

Properties Y-class dwarfs are among the coldest of all brown dwarfs. WISE 2220-3628 was observed with JWST and found to be very similar to CWISEP J1935-1546, with the difference of having no signature of an aurora and no temperature inversion in its atmosphere.

Distance The most accurate distance estimate of WISE 2220−3628 was a trigonometric parallax, published in 2014 by Beichman et al.: 0.136 ± 0.017 arcsec, corresponding to a distance of 7.4 ± 0.9 pc (24.1 ± 2.9 ly). Later the parallax measurement was improved revealing a larger distance of about 34 light years.

See also List of star systems within 30–35 light-years List of Y-dwarfs WISE 0146+4234 (Y0) WISE 0350−5658 (Y1) WISE 0359−5401 (Y0) WISE 0535−7500 (≥Y1) WISE 0713−2917 (Y0) WISE 0734−7157 (Y0)

References

Illustrations

Worked examples

Example 1 — a first encounter with WISE 2220−3628

Start with the simplest possible case. Write down what WISE 2220−3628 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 2220−3628 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 2220−3628 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 2220−3628

In research: WISE 2220−3628 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 2220−3628 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 2220−3628 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brown dwarfs, Grus (constellation), WISE objects, so understanding it makes those chapters shorter.
In everyday life: Look for WISE 2220−3628 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 2220−3628 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WISE 2220−3628 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 2220−3628 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WISE 2220−3628 in simple terms?

WISE J222055.31−362817.4 (designation abbreviated to WISE 2220−3628) is a brown dwarf of spectral class Y0, located in constellation Grus at approximately 34.2 light-years from Earth. Discovery WISE 2220−3628 was discovered in 2012 by J.

Why does WISE 2220−3628 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 2220−3628?

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 2220−3628.