astronomy

Gliese 268

Gliese 268 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 Gliese 268 rather than just read about it. In short: Gliese 268 (QY Aurigae) is a binary star system in the constellation of Auriga, and is one of the one hundred closest star systems to the Earth, at a distance of 19.741 light-years (6.053 parsecs) away. Gliese 268 is composed of two M-type dwarfs, or red dwarfs.

Key takeaways

Gliese 268 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Gliese 268 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Gliese 268 from memory before moving on to harder problems.

Reference excerpt

Gliese 268 (QY Aurigae) is a binary star system in the constellation of Auriga, and is one of the one hundred closest star systems to the Earth, at a distance of 19.741 light-years (6.053 parsecs) away. Gliese 268 is composed of two M-type dwarfs, or red dwarfs. The primary component of the system is calculated to have an apparent magnitude of 11.95, and the secondary component an apparent magnitude of 12.45. In 1975, Bjørn Ragnvald Pettersen discovered that Gliese 268 is a flare star. It received its variable star designation, QY Aurigae, in 1977.

Notes

References

Illustrations

Worked examples

Example 1 — a first encounter with Gliese 268

Start with the simplest possible case. Write down what Gliese 268 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 Gliese 268 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 Gliese 268 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 Gliese 268

In research: Gliese 268 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 Gliese 268 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: Gliese 268 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Auriga, Gliese and GJ objects, Hipparcos objects, so understanding it makes those chapters shorter.
In everyday life: Look for Gliese 268 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 Gliese 268 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gliese 268 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 Gliese 268 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gliese 268 in simple terms?

Why does Gliese 268 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 Gliese 268?

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 Gliese 268.