science

OGLE-2011-BLG-0462

OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462 rather than just read about it. In short: OGLE-2011-BLG-0462, also known as MOA-2011-BLG-191, is a stellar-mass black hole isolated in interstellar space. OGLE-2011-BLG-0462 lies at a distance of 1,720 parsecs (5,610 light years) in the direction of the galactic bulge in the constellation Sagittarius.

Key takeaways

OGLE-2011-BLG-0462 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect OGLE-2011-BLG-0462 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of OGLE-2011-BLG-0462 from memory before moving on to harder problems.

Reference excerpt

OGLE-2011-BLG-0462, also known as MOA-2011-BLG-191, is a stellar-mass black hole isolated in interstellar space. OGLE-2011-BLG-0462 lies at a distance of 1,720 parsecs (5,610 light years) in the direction of the galactic bulge in the constellation Sagittarius. The black hole has a mass of about 7.15 M☉. OGLE-2011-BLG-0462 is the first truly isolated black hole which has been confirmed.

Discovery OGLE-2011-BLG-0462 was discovered by the OGLE survey through microlensing when it passed in front of a background star that was 20,000 light years away from Earth. The black hole's gravity bent the star's light, causing a sharp spike in brightness that was detected by the Hubble Space Telescope. It took six years to confirm the existence of OGLE-2011-BLG-0462. Its initial kick velocity has been estimated to have an upper limit of 100 km/s. No significant X-ray emission has been detected from gas accreting onto the black hole indicating that it is truly isolated.

References

Illustrations

Worked examples

Example 1 — a first encounter with OGLE-2011-BLG-0462

Start with the simplest possible case. Write down what OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462

In research: OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462 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: OGLE-2011-BLG-0462 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gravitational lensing, Sagittarius (constellation), Stellar black holes, so understanding it makes those chapters shorter.
In everyday life: Look for OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OGLE-2011-BLG-0462 in simple terms?

Why does OGLE-2011-BLG-0462 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 OGLE-2011-BLG-0462?

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 OGLE-2011-BLG-0462.