astronomy

Gliese 887 c

Gliese 887 c 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 887 c rather than just read about it. In short: Gliese 887 c (GJ 887 c) or Lacaille 9352 c is an exoplanet announced in 2020 and located 10.74 light years away, in the constellation of Piscis Austrinus. It was detected using the radial velocity method from observations with HARPS in Chile and HIRES in Hawaii.

Key takeaways

Gliese 887 c 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 887 c to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Gliese 887 c from memory before moving on to harder problems.

Reference excerpt

Gliese 887 c (GJ 887 c) or Lacaille 9352 c is an exoplanet announced in 2020 and located 10.74 light years away, in the constellation of Piscis Austrinus. It was detected using the radial velocity method from observations with HARPS in Chile and HIRES in Hawaii.

Characteristics Gliese 887 c is considered a Super-Earth with a minimum mass of 7.6 Earth masses. With an orbital period of 21.8 days, the exoplanet is located at 0.12 AU from the star, which is close to the inner edge of the habitable zone (but still outside). The exoplanet has a calculated equilibrium temperature of 352 K (79 °C; 174 °F).

Host star

The planet orbits the red dwarf star Gliese 887, which has an age of 4.57 billion years.

References

Worked examples

Example 1 — a first encounter with Gliese 887 c

Start with the simplest possible case. Write down what Gliese 887 c 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 887 c 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 887 c 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 887 c

In research: Gliese 887 c 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 887 c 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 887 c is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanet stubs, Exoplanets detected by radial velocity, Exoplanets discovered in 2019, so understanding it makes those chapters shorter.
In everyday life: Look for Gliese 887 c 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 887 c in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gliese 887 c 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 887 c out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gliese 887 c in simple terms?

Why does Gliese 887 c 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 887 c?

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 887 c.