astronomy

Jamal ad-Din Bukhari

Jamal ad-Din Bukhari 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 Jamal ad-Din Bukhari rather than just read about it. In short: Jamal ad-Din Muḥammad ibn Ṭāhir ibn Muḥammad al‐Zaydī al‐Bukhārī (variously transcribed Jamal ud-Din, Jamal al-Din (lit. Beauty of Faith), etc., Chinese name Zhamaluding) was a 13th-century Persian astronomer.

Key takeaways

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

Reference excerpt

Jamal ad-Din Muḥammad ibn Ṭāhir ibn Muḥammad al‐Zaydī al‐Bukhārī (variously transcribed Jamal ud-Din, Jamal al-Din (lit. Beauty of Faith), etc., Chinese name Zhamaluding) was a 13th-century Persian astronomer. Originally from Bukhara, he entered the service of Kublai Khan around the 1250s to set up the Islamic Astronomical Bureau in the new capital of Beijing, to operate in parallel with the traditional Chinese bureau. Kublai Khan thus maintained the bureaucratic structure, but allowed Chinese observations and predictions to be checked by respected Muslim scholars. He is credited with having taken seven astronomical instruments to Kublai Khan, as a present from Hulagu Khan including a Persian astrolabe, a globe and an armillary sphere, in 1267. This is the earliest known reference to a spherical terrestrial globe of the Earth in Chinese astronomy. He is associated with a zij in Persian which has been lost but was translated into Chinese in 1383 by Ma‐shayihei with the title Huihuilifa (Islamic calendar). This contained Ptolemaic tables based on new values and adjusted to Beijing and has been reconstructed in recent years. In general, the activity of the Islamic Astronomical Bureau didn't make much difference to Chinese astronomy. However Guo Shoujing did evidently gain the idea of the torquetum from him (which he didn't bring), and produced a simplified version which omitted ecliptic coordinates which were not used in China. In 1286 he carried out a large-scale survey of the Yuan empire which was produced in 755 volumes as the Dayitongzh. All but the introduction of this has been lost.

Worked examples

Example 1 — a first encounter with Jamal ad-Din Bukhari

Start with the simplest possible case. Write down what Jamal ad-Din Bukhari 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 Jamal ad-Din Bukhari 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 Jamal ad-Din Bukhari 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 Jamal ad-Din Bukhari

In research: Jamal ad-Din Bukhari 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 Jamal ad-Din Bukhari 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: Jamal ad-Din Bukhari is common in secondary-school and first-year university syllabi. It links to neighbouring topics 13th-century Iranian astronomers, Globe makers, Islam in China, so understanding it makes those chapters shorter.
In everyday life: Look for Jamal ad-Din Bukhari 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 Jamal ad-Din Bukhari in 20 minutes

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

Frequently asked questions

What is Jamal ad-Din Bukhari in simple terms?

Why does Jamal ad-Din Bukhari 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 Jamal ad-Din Bukhari?

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 Jamal ad-Din Bukhari.