HAN DYNASTY
Major Events
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  • During the reins of Emperor Wu, astronomers created the first relatively complete calender -- The Calender of Sun.
  • Zhang Heng, one of the most famous scientists in Chinese history, gave the earliest explanation of moon eclipse.
  • Zhang Heng invented world's first armilary sphere made of bronze and the first machine that was able to detect the direction of earthquakes. His earthquake detector was earlier than the one made by Europeans by 1700 years.
  • BC 28, West Han's record of Sun's black spots is World's earliest record.
Mathematics
    The major advancement in Mathematics is brought about by the book Nine Chapters of Mathematics.

    Nine Chapters of Mathematics.

    • introduced many mathematical propositions and its solutions
    • the World's most advanced applied mathematics at the time
    • its appearance showed that Chinese mathematics has developed into a system

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