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Celestial Navigation

Posted on February 16, 2016 by siyuan2016

Navigational Compass used in Ming Dynasty      image source Before the invention of artificial satellites and development of data transformation, celestial navigation played an indispensable role in human’s exploration and discovery of newfound lands. And in this blog, I would like to introduce some celestial navigating technologies implemented in Zheng He’s treasury voyage, one […] Continue reading →

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Solstices and Equinoxes

Posted on January 26, 2016 by siyuan2016

Source:Solstice and equinox dates Astrology plays an important roles in ancient civilizations like Egypt ,Sumeria and China.Because their deep connections to agricultures and societies,solstices and equinoxes were celebrated by both nobles and civilians in China for over a thousand years.And this blog is intended  to introduce some activities and customs popular on these four special days.On […] Continue reading →

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Vast Size and Scale of the Universe

Posted on January 26, 2016 by siyuan2016

Source:Getty We talked about the size and scale of our universe in the class last week, and here I’d like to add some interesting facts and discoveries in this field.Though we have already had some approximations about universe’s age,nowadays it is still hard to estimate the exact size of the it. With the development of […] Continue reading →

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