character: Ulugh Beg
topic: Influence on Astronomical Measurements
subject: History
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character: Nicolaus Copernicus
topic: Heliocentric Theory and its Relation to Ulugh Beg's Work
subject: History
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character: Johannes Kepler
topic: Elliptical Orbits and their Connection to Ulugh Beg's Observations
subject: History
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character: Ibn al-Haytham
topic: Optics and Its Impact on Astronomy during Ulugh Beg's Era
subject: History
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