science

Gliese 293

Gliese 293 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 Gliese 293 rather than just read about it. In short: Gliese 293 (or WD 0752-676, or LHS 34, or L 97-12) is a nearby white dwarf star, located 26.64 light-years away in the constellation Volans. It is the nearest star in this constellation and also the only one within 10 parsecs.

Key takeaways

Gliese 293 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Gliese 293 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Gliese 293 from memory before moving on to harder problems.

Reference excerpt

Gliese 293 (or WD 0752-676, or LHS 34, or L 97-12) is a nearby white dwarf star, located 26.64 light-years away in the constellation Volans. It is the nearest star in this constellation and also the only one within 10 parsecs.

Distance Gliese 293 is the 12th-nearest known white dwarf. A trigonometric parallax of Gliese 293 was included in the YPC (Yale Parallax Catalog), and subsequently it was measured more precisely in CTIOPI (Cerro Tololo Inter-American Observatory (CTIO) Parallax Investigation) 0.9 m telescope program, and by Gaia.

Physical parameters The mass of Gliese 293 is 0.59±0.01 Solar masses, and its surface gravity is 108.00±0.02 cm/s2, or approximately 102,000 times Earth's, corresponding to a radius of 8,887 kilometres (5,522 miles), or 139% of Earth's. Gliese 293 has a temperature of 5,700±90 K, almost like the Sun, and a cooling age, i.e. age as a degenerate star (not including its lifetime as a main-sequence star and a giant star) of 2.65±0.10 Gyr It has a white appearance due to similar temperature to Sun.

See also List of star systems within 25–30 light-years

Notes

References

Worked examples

Example 1 — a first encounter with Gliese 293

Start with the simplest possible case. Write down what Gliese 293 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 Gliese 293 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 293 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 293

In research: Gliese 293 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 Gliese 293 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 293 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gliese and GJ objects, Volans, White dwarfs, so understanding it makes those chapters shorter.
In everyday life: Look for Gliese 293 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 293 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gliese 293 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 293 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gliese 293 in simple terms?

Why does Gliese 293 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 Gliese 293?

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 293.