ArticleslgStudy

astronomy

WISE J1147−2040

WISE J1147−2040 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 WISE J1147−2040 rather than just read about it. In short: WISEA J114724.10−204021.3 (abbreviated WISEA 1147) is a sub-brown dwarf or rogue planet in the TW Hydrae association, a nearby group of very young stars and brown dwarfs. The object is notable because its estimate mass, 6±1 times the mass of Jupiter, places it in the mass range for rogue planets.

WISE J1147−2040 — main illustration
WISE J1147−2040 — illustration

Key takeaways

  • WISE J1147−2040 belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect WISE J1147−2040 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of WISE J1147−2040 from memory before moving on to harder problems.

Reference excerpt

WISEA J114724.10−204021.3 (abbreviated WISEA 1147) is a sub-brown dwarf or rogue planet in the TW Hydrae association, a nearby group of very young stars and brown dwarfs. The object is notable because its estimate mass, 6±1 times the mass of Jupiter, places it in the mass range for rogue planets. As such, it is a free-floating object, unassociated with any star system. The object was discovered using information from NASA's WISE (Wide-field Infrared Survey Explorer) and the 2MASS (Two Micron All-Sky Survey). Researchers inferred the young age for WISEA 1147 because it is a member of a group of stars that is only 10 million years old, and they estimated its mass using evolutionary models for brown dwarf cooling.

References

Illustrations

WISE J1147−2040 illustration

Worked examples

Example 1 — a first encounter with WISE J1147−2040

Start with the simplest possible case. Write down what WISE J1147−2040 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 WISE J1147−2040 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 J1147−2040 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 J1147−2040

In research
WISE J1147−2040 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 WISE J1147−2040 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 J1147−2040 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brown dwarf stubs, Brown dwarfs, Crater (constellation), so understanding it makes those chapters shorter.
In everyday life
Look for WISE J1147−2040 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.
Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “WISE J1147−2040” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study WISE J1147−2040 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what WISE J1147−2040 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain WISE J1147−2040 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WISE J1147−2040 in simple terms?

WISEA J114724.10−204021.3 (abbreviated WISEA 1147) is a sub-brown dwarf or rogue planet in the TW Hydrae association, a nearby group of very young stars and brown dwarfs. The object is notable because its estimate mass, 6±1 times the mass of Jupiter, places it in the mass range for rogue planets.

Why does WISE J1147−2040 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 WISE J1147−2040?

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 J1147−2040.

Tags

  • Brown dwarf stubs
  • Brown dwarfs
  • Crater (constellation)
  • L-type brown dwarfs
  • Rogue planets
  • TW Hydrae association
  • WISE objects

Keep exploring