astronomy

GJ 1002 b

GJ 1002 b 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 1002 b rather than just read about it. In short: GJ 1002 b (also designated as Gliese 1002 b) is a potentially habitable exoplanet located 16 light-years away, in the constellation of Cetus. The planet, which has an Earth Similarity Index of 86%, is in the habitable zone of its parent star.

Key takeaways

GJ 1002 b 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 1002 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of GJ 1002 b from memory before moving on to harder problems.

Reference excerpt

GJ 1002 b (also designated as Gliese 1002 b) is a potentially habitable exoplanet located 16 light-years away, in the constellation of Cetus. The planet, which has an Earth Similarity Index of 86%, is in the habitable zone of its parent star. GJ 1002 b has a minimum mass of 1.08 Earth masses and is estimated by the Planetary Habitability Laboratory to have 1.03 times the radius of Earth and a surface temperature of 261 Kelvin.

Detection GJ 1002 b was detected in 2022 via the radial velocity method, which was used to measure the planet's minimum mass.

Host star The host star, GJ 1002, is a quiet M5.5V type red dwarf not believed to release flares that could harm the atmosphere. The planet orbits its host star at a distance of 0.0457 AU (Astronomical units), with a 10.3 day orbital period and a 0.0 eccentricity.

See also Proxima Centauri b, a potentially habitable planet of similar physical characteristics that is also orbiting a small red dwarf star.

References

Worked examples

Example 1 — a first encounter with GJ 1002 b

Start with the simplest possible case. Write down what GJ 1002 b 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 1002 b 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 1002 b 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 1002 b

In research: GJ 1002 b 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 1002 b 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 1002 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cetus (constellation), Exoplanet stubs, Exoplanets detected by radial velocity, so understanding it makes those chapters shorter.
In everyday life: Look for GJ 1002 b 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 1002 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what GJ 1002 b 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 1002 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is GJ 1002 b in simple terms?

Why does GJ 1002 b 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 1002 b?

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 1002 b.