astronomy

OGLE-2005-BLG-071L

OGLE-2005-BLG-071L 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 OGLE-2005-BLG-071L rather than just read about it. In short: OGLE-2005-BLG-071L is a distant, magnitude 19.5 galactic bulge star located in the constellation Scorpius, approximately 11,000 light years away from the Solar System. The star is probably a red dwarf with a mass 43% of that of the Sun.

Key takeaways

OGLE-2005-BLG-071L belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect OGLE-2005-BLG-071L to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of OGLE-2005-BLG-071L from memory before moving on to harder problems.

Reference excerpt

OGLE-2005-BLG-071L is a distant, magnitude 19.5 galactic bulge star located in the constellation Scorpius, approximately 11,000 light years away from the Solar System. The star is probably a red dwarf with a mass 43% of that of the Sun.

Planetary system In 2005 an exoplanet was discovered orbiting this star by the microlensing method, the second planet found by this method. The planet was later confirmed by the Keck telescope and its properties were refined.

See also List of extrasolar planets Optical Gravitational Lensing Experiment or OGLE

References

External links "OGLE-05-071L". Exoplanets. Archived from the original on 2012-04-01. Retrieved 2009-04-30.

Worked examples

Example 1 — a first encounter with OGLE-2005-BLG-071L

Start with the simplest possible case. Write down what OGLE-2005-BLG-071L 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 OGLE-2005-BLG-071L 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-2005-BLG-071L 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-2005-BLG-071L

In research: OGLE-2005-BLG-071L 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 OGLE-2005-BLG-071L 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-2005-BLG-071L is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gravitational lensing, M-type main-sequence stars, Planetary systems with one confirmed planet, so understanding it makes those chapters shorter.
In everyday life: Look for OGLE-2005-BLG-071L 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-2005-BLG-071L in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what OGLE-2005-BLG-071L 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-2005-BLG-071L out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OGLE-2005-BLG-071L in simple terms?

Why does OGLE-2005-BLG-071L 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 OGLE-2005-BLG-071L?

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-2005-BLG-071L.