science

Treatise on Astrology of the Kaiyuan Era

Treatise on Astrology of the Kaiyuan Era 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 Treatise on Astrology of the Kaiyuan Era rather than just read about it. In short: The Great Tang Treatise on Astrology of the Kaiyuan Era, also called the Kaiyuan Star Observations (Kaiyuan Zhanjing), is a Chinese astrology encyclopedia compiled by Gautama Siddha and a team of scholars between 714 and 724 AD during the Kaiyuan era of the Tang dynasty. The book is divided into 120 volumes and consists of about 600,000 words.

Key takeaways

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

Reference excerpt

The Great Tang Treatise on Astrology of the Kaiyuan Era, also called the Kaiyuan Star Observations (Kaiyuan Zhanjing), is a Chinese astrology encyclopedia compiled by Gautama Siddha and a team of scholars between 714 and 724 AD during the Kaiyuan era of the Tang dynasty. The book is divided into 120 volumes and consists of about 600,000 words. The Kaiyuan Zhanjing incorporates many fragments of other works, including the star catalogues of Shi Shen and Gan De and a translated version of Indian Navagraha calendar at chapter 104. It may have made use of the Yisizhan, compiled by Li Chunfeng around 645. Aryabhata's sine table by the eponymous Indian astronomer, was also translated into the Kaiyuan Zhanjing. The Kaiyuan Zhanjing ceased to be copied in the 10th century, but received attention from the scholar Cheng Mingshan in 1616 and was later included in the Complete Library of the Four Treasuries collections of the 18th century.

Notes

References Bai Shouyi; et al. (1989). A Comprehensive History of China. Vol. 10. Shanghai: Shanghai Renmin Chubanshe. pp. 2, 008–2, 009. ISBN 7-208-04997-1. Liu Shaojun (1992). Studies of the Chinese Mystical Culture Series : Comment and Review on the Ancient Astrology. Beijing: Beijing Normal University Press. pp. 107–111. ISBN 7-303-01790-9.

External links Ancient Chinese Books and Records of Science and Technology (PDF) Da Tang Kaiyuan zhan jing, on the Library of Congress

Illustrations

Worked examples

Example 1 — a first encounter with Treatise on Astrology of the Kaiyuan Era

Start with the simplest possible case. Write down what Treatise on Astrology of the Kaiyuan Era 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 Treatise on Astrology of the Kaiyuan Era 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 Treatise on Astrology of the Kaiyuan Era 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 Treatise on Astrology of the Kaiyuan Era

In research: Treatise on Astrology of the Kaiyuan Era 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 Treatise on Astrology of the Kaiyuan Era 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: Treatise on Astrology of the Kaiyuan Era is common in secondary-school and first-year university syllabi. It links to neighbouring topics 724, 8th-century books, 8th century in China, so understanding it makes those chapters shorter.
In everyday life: Look for Treatise on Astrology of the Kaiyuan Era 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Treatise on Astrology of the Kaiyuan Era” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Treatise on Astrology of the Kaiyuan Era in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Treatise on Astrology of the Kaiyuan Era 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 Treatise on Astrology of the Kaiyuan Era out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Treatise on Astrology of the Kaiyuan Era in simple terms?

Why does Treatise on Astrology of the Kaiyuan Era 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 Treatise on Astrology of the Kaiyuan Era?

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 Treatise on Astrology of the Kaiyuan Era.