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astronomy

Star and crescent

Star and crescent 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 Star and crescent rather than just read about it. In short: The conjoined representation of a star and a crescent is used in various historical contexts, including as a prominent symbol of the Ottoman Empire, and in contemporary times, as a national symbol by some countries, and by some Muslims as a symbol of Islam, while other Muslims reject its use as an Islamic symbol. It was developed in the Greek colony of Byzantium ca. 300 BC, though it became more widely used as the r…

Star and crescent — main illustration
Star and crescent — illustration

Key takeaways

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

Reference excerpt

The conjoined representation of a star and a crescent is used in various historical contexts, including as a prominent symbol of the Ottoman Empire, and in contemporary times, as a national symbol by some countries, and by some Muslims as a symbol of Islam, while other Muslims reject its use as an Islamic symbol. It was developed in the Greek colony of Byzantium ca. 300 BC, though it became more widely used as the royal emblem of Pontic king Mithridates VI Eupator after he incorporated Byzantium into his kingdom for a short period. During the 5th century, it was present in coins minted by the Persian Sassanian Empire; the symbol was represented in the coins minted across the empire throughout the Middle East for more than 400 years from the 3rd century until the fall of the Sassanians after the Muslim conquest of Persia in the 7th century. The conquering Muslim rulers kept the symbol in their coinage during the early years of the caliphate, as the coins were exact replicas of the Sassanian coins. Both elements of the symbol have a long history in the iconography of the Ancient Near East as representing either the Sun and Moon or the Moon and Venus (Morning Star) (or their divine personifications). It has been suggested that the crescent actually represents Venus, or the Sun during an eclipse. Coins with star and crescent symbols represented separately have a longer history, with possible ties to older Mesopotamian iconography. The star, or Sun, is often shown within the arc of the crescent (also called star in crescent, or star within crescent, for disambiguation of depictions of a star and a crescent side by side). In numismatics in particular, the term pellet within crescent is used in cases where the star is simplified to a single dot. The combination is found comparatively rarely in late medieval and early modern heraldry. It rose to prominence with its adoption as the flag and national symbol of the Ottoman Empire and some of its administrative divisions (eyalets and vilayets) and later in the 19th-century Westernizing tanzimat (reforms). The Ottoman flag of 1844, with a white ay-yıldız (Turkish for "crescent-star") on a red background, continues in use as the flag of the Republic of Turkey, with minor modifications. Other states formerly part of the Ottoman Empire also used the symbol, including Libya (1951–1969 and after 2011), Tunisia (1831) and Algeria (1958). The same symbol was used in other national flags introduced during the 20th century, including the flags of Kazakhstan (1917), Azerbaijan (1918), Pakistan (1947), Malaysia (1948), Singapore (1959), Mauritania (1959), Uzbekistan (1991), Turkmenistan (1991) and Comoros (2001). In the latter 20th century, the star and crescent have acquired a popular interpretation as a "symbol of Islam", occasionally embraced by Arab nationalism or Islamism in the 1970s to 1980s but often rejected as erroneous or unfounded by Muslim commentators in more recent times. Unlike the cross, which is a symbol of Jesus' crucifixion in Christianity, there is no solid link that connects the star and crescent symbol with the concept of Islam. The connotation is widely believed to have come from the flag of the Ottoman Empire, whose prestige as an Islamic empire and caliphate led to the adoption of its state emblem as a symbol of Islam by association.

History

Origins and predecessors

Crescents appearing together with a star or stars are a common feature of Sumerian iconography, the crescent usually being associated with the moon god Sin (Nanna) and the star with Ishtar (Inanna, i.e. Venus), often placed alongside the sun disk of Shamash.

In Late Bronze Age Canaan, star and crescent moon motifs are also found on Moabite name seals. The depiction of the "star and crescent" or "star inside crescent" as it would later develop in Bosporan Kingdom is difficult to trace to Mesopotamian art. Exceptionally, a combination of the crescent of Sin with the five-pointed star of Ishtar, with the star placed inside the crescent as in the later Hellenistic-era symbol, placed among numerous other symbols, is found in a boundary stone of Nebuchadnezzar I (12th century BC; found in Nippur by John Henry Haynes in 1896). An example of such an arrangement is also found in the (highly speculative) reconstruction of a fragmentary stele of Ur-Nammu (Third Dynasty of Ur) discovered in the 1920s. A very early depiction of the symbol (crescent moon, stars and sun disc) is found on the Nebra sky disc, dating from c. 1800 – c. 1600 BC (Nebra, Germany). A gold signet ring from Mycenae dating from the 15th century BC also shows the symbol. The star and crescent (or 'crescent and pellet') symbol appears 19 times on the Berlin Gold Hat, dating from c. 1000 BC.

Classical antiquity

Greeks and Romans

… excerpt ends here. Continue reading the full article.

Illustrations

Star and crescent illustration
Star and crescent illustration
Star and crescent: The natural phenomenon of a conjunction of the crescent Moon and, in this case, Venus; respectively the second and third brightest natural objects in Earth's sky
The natural phenomenon of a conjunction of the crescent Moon and, in this case, Venus; respectively the second and third brightest natural objects in Earth's sky
Star and crescent: Sealing depicting the Neo Sumerian King, Ibbi-Sin seated with a star or Dingir and crescent adjacent to him
Sealing depicting the Neo Sumerian King, Ibbi-Sin seated with a star or Dingir and crescent adjacent to him
Star and crescent: Depiction of the emblems of Ishtar (Venus), Sin (Moon), and Shamash (Sun)  on a boundary stone of Meli-Shipak II (12th century BC)
Depiction of the emblems of Ishtar (Venus), Sin (Moon), and Shamash (Sun) on a boundary stone of Meli-Shipak II (12th century BC)

Worked examples

Example 1 — a first encounter with Star and crescent

Start with the simplest possible case. Write down what Star and crescent 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 Star and crescent 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 Star and crescent 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 Star and crescent

In research
Star and crescent 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 Star and crescent 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
Star and crescent is common in secondary-school and first-year university syllabi. It links to neighbouring topics Heraldic charges, Iconography, Inanna, so understanding it makes those chapters shorter.
In everyday life
Look for Star and crescent 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 Star and crescent in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Star and crescent means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Star and crescent out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Star and crescent in simple terms?

The conjoined representation of a star and a crescent is used in various historical contexts, including as a prominent symbol of the Ottoman Empire, and in contemporary times, as a national symbol by some countries, and by some Muslims as a symbol of Islam, while other Muslims reject its use as an…

Why does Star and crescent 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 Star and crescent?

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 Star and crescent.

Tags

  • Heraldic charges
  • Iconography
  • Inanna
  • Islam-related controversies
  • Islamic symbols
  • Mithridates VI Eupator
  • Moon in culture
  • National symbols of Algeria
  • National symbols of Pakistan
  • National symbols of Tunisia
  • National symbols of Turkey
  • Numismatic terminology

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