| 1. | A summary is in Zhang Heng's article Armillary sphere.
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| 2. | A triumphal arch are supported with posts decorated with armillary spheres.
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| 3. | The Portuguese shield was kept, being positioned over the armillary sphere.
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| 4. | It was intended to serve as an automatic armillary sphere.
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| 5. | The armillary was a symbol of the king of Portugal.
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| 6. | The clock has an armillary sphere with a diameter of 40 cm.
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| 7. | The ancient Greeks and Chinese seem to have independently developed the armillary sphere.
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| 8. | Around 255 BC, he invented the armillary sphere.
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| 9. | This is the principle behind the armillary sphere and the equatorial bow sundial.
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| 10. | Hipparchus probably used an armillary sphere of four rings.
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