astronomy

Tiankun-1

Tiankun-1 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 Tiankun-1 rather than just read about it. In short: Tiankun-1 (also known as TK-1) is a Chinese experimental technology demonstration satellite developed, operated, and launched by China Aerospace Science and Industry Corporation (CASIC). It was launched on March 2, 2017, and is designed in order to test its satellite bus, as well as small satellite operations.

Key takeaways

Tiankun-1 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tiankun-1 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tiankun-1 from memory before moving on to harder problems.

Reference excerpt

Tiankun-1 (also known as TK-1) is a Chinese experimental technology demonstration satellite developed, operated, and launched by China Aerospace Science and Industry Corporation (CASIC). It was launched on March 2, 2017, and is designed in order to test its satellite bus, as well as small satellite operations. The satellite decayed from orbit on 7 July 2023.

Design Tiankun-1 is a small satellite designed to test technologies meant for satellites of such sizes, as well as experiment with the operation of small satellites. With its small launch vehicles, China hopes to be able to get a share in the international small satellite launch market. Tiankun-1's mission is to test out its satellite bus and performance in orbit. It would also be used for testing remote sensing and telecommunications technologies, as well as test out minisatellite-based experiments and operations. It is the first spacecraft to be developed by the CASIC as part of its plans to expand its commercial space plans.

Launch Tiankun-1 was launched on board a Kaituozhe-2 rocket, which is a then-new small launch vehicle. It launched from Jiuquan Satellite Launch Center on March 2, 2017, at 07:53 CST (23:53 UTC) into a polar orbit. It was the Kaituozhe-2's first launch, and its first successful one. It was launched to a low Earth orbit with a perigee of 373.3 km (232.0 mi), an apogee of 417.3 km (259.3 mi) and an inclination of 97.2°.

References

Worked examples

Example 1 — a first encounter with Tiankun-1

Start with the simplest possible case. Write down what Tiankun-1 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 Tiankun-1 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 Tiankun-1 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 Tiankun-1

In research: Tiankun-1 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 Tiankun-1 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: Tiankun-1 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2017 in spaceflight, Satellites in low Earth orbit, Satellites of China, so understanding it makes those chapters shorter.
In everyday life: Look for Tiankun-1 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 Tiankun-1 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tiankun-1 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 Tiankun-1 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tiankun-1 in simple terms?

Why does Tiankun-1 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 Tiankun-1?

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 Tiankun-1.