astronomy

GJ 3293

GJ 3293 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 GJ 3293 rather than just read about it. In short: GJ 3293 (sometimes Gliese 3293) is a star in the constellation of Eridanus, that is orbited by four planets, two of which (GJ 3293b & GJ 3293d) are located within the star's habitable zone. It is located at the celestial coordinates: Right Ascension 04h 28m 35.71911s, Declination −25° 10′ 09.2979″.

Key takeaways

GJ 3293 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect GJ 3293 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of GJ 3293 from memory before moving on to harder problems.

Reference excerpt

GJ 3293 (sometimes Gliese 3293) is a star in the constellation of Eridanus, that is orbited by four planets, two of which (GJ 3293b & GJ 3293d) are located within the star's habitable zone. It is located at the celestial coordinates: Right Ascension 04h 28m 35.71911s, Declination −25° 10′ 09.2979″. With an apparent visual magnitude of 11.96, this star is too faint to be seen with the naked eye. It can be viewed with a telescope having an aperture of at least 4 in (10 cm). The estimated distance to GJ 3293 is 65.9 light-years (20.2 parsecs), based on its stellar parallax. GJ 3293 is significantly smaller and cooler than the Sun.

Planetary system In 2015, it was discovered that GJ 3293 possessed two planets, and in 2017 an additional two planets were discovered, making a total of four. Two of these planets are located within the habitable zone: GJ 3293b and GJ 3293d.

References

Worked examples

Example 1 — a first encounter with GJ 3293

Start with the simplest possible case. Write down what GJ 3293 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 GJ 3293 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 GJ 3293 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 GJ 3293

In research: GJ 3293 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 GJ 3293 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: GJ 3293 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Eridanus (constellation), Gliese and GJ objects, M-type main-sequence stars, so understanding it makes those chapters shorter.
In everyday life: Look for GJ 3293 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 GJ 3293 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what GJ 3293 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 GJ 3293 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is GJ 3293 in simple terms?

Why does GJ 3293 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 GJ 3293?

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 GJ 3293.