Shi Shen
1. Gan's year star method, also called Gan's 47 method, is a type of year star dating method in astronomy. It is a method of measuring the movement directions of celestial bodies such as the sun and moon using twenty-eight constellations .
2. "Ganxiang New Book" records: "There are fifty-nine official stars in Gande, a total of 211 stars, from Pingdao to Ye; there are thirty-nine external officials, from a total of 29 stars, from Tianmen to Qingshang; there are twenty Ziwei stars, a total of 11 stars. A total of 118 stars, 511 stars." In other words, he observed so many stars with the naked eye.
Ancient map of the cloudy sky
3. "Hanshu Astronomical Chronicles": "The five stars in the ancient calendar are in retrograde motion. In the Gan Shi Shi (Star) Sutra, Yinghuo ( Mars ) Taibai (Venus) is regarded as retrograde." What is said here is that he studied the operation rules of the five stars of "Gold, Wood, Water, Fire, and Earth".
4. He developed the oldest star catalog in the 3rd century BC. In the West, the ancient Greek astronomer Hipparchus compiled a star catalog around 190 BC ~ 125 BC. Before him, there were Aristiles and Timochares, but they were not earlier than the 3rd century BC.
Ancient Cloudy Sky Map
5. Observation of Jupiter Discovered Jupiter. Gander observed Jupiter's brightest satellite Ganymede in the mid-4th century BC. The modern discovery of Jupiter's satellites was only discovered after the invention of the telescope in the early 17th century, when the great Italian scientist Galileo used it to observe Jupiter in 1610.
Second, Shi Shen. Also known as Shi Shenfu, Shi Shenfu, or Shi Shenfu, he was an astrologer and astrologer in the middle of the Warring States, Wei, and Kaifeng. He was one of the Chinese who named the crater on the back of the moon after his name. He and Gan De were astronomers of the same period. The "Historical Records Tianbaoshu" records: "In the past, those who passed down the number of heaven... were in Qi, Gan Gong;... Wei, Shi Shen." Their joint name is " Ganshi Star Scripture ". There was also Wu Xian at the same time, but he was not as famous, but he was also earlier than those in the West.
Astronomical picture
Third, Guo Shoujing . He was a famous mathematician and hydraulic scientist in the Yuan Dynasty, and more importantly, he was also an astronomer.
1. When Guo Shoujing was a boy, he used bamboo strips to make an armillary sphere for measuring the sky based on an illustration in a book. He also piled soil to make an earthen step and placed the bamboo armillary sphere on it for astronomical observations. A " simple instrument " created in 1276 AD to measure the position of celestial bodies. The creation of Jianyi was a great leap forward in the history of Chinese astronomical instrument manufacturing, and he was the first person in the world at that time.
Ancient astronomical star chart
2. He also figured out the working principle of this timekeeping instrument that could keep the water surface of the clepsydra stable and was quite advanced at the time based on a stone rubbing of a lotus in Yansu in the Northern Song Dynasty.
3. In the seventeenth year of the Yuan Dynasty (1280), the "Time Calendar" was completed. This book is an excellent calendar in Chinese history.
Four Seasons and Constellations
4. Guo Shoujing once proposed to use sea level as the benchmark to compare the difference in terrain between Dadu (today's Beijing) and Bianliang (today's Kaifeng, Henan). This is the origin of "altitude", an important concept in geography.
fourth, Tao Chengdao - the world's first aerospace person. That's right, the world's first man in space was in China. He was the hero who helped Ming Dynasty Zhu Yuanzhang become emperor. He repeatedly performed extraordinary feats in various wars and was awarded the title of "Ten Thousand Households" by Zhu Yuanzhang. From then on, Tao Chengdao was called "Ten Thousand Households". Tao Chengdao didn't like being an official, but he especially liked research.
Tao Chengdao
In Tao Chengdao's later years, he finally sacrificed for the aerospace industry in order to realize his dream: he tied 47 homemade rockets to a chair, sat on it, held up 2 large kites with both hands, and then asked someone to ignite and launch - he succeeded, he flew into the sky! It's just that an accident happened and the rocket exploded...
In any case, he was the first person to fly in space and the first person to sacrifice for space. He was extremely great!
thousand households flying
fifth, horse and . He was an expert and chemist in the Tang Dynasty. The representative work " Pinglong recognizes ", the book has only 68 pages. It was published in the first year of Emperor Suzong's reign in the Tang Dynasty, and then spread until the Qing Dynasty . But later, in order to make the world think that these research results were discovered by Germany, the German invaders took advantage of the chaos when the Eight-Power Allied Forces invaded China.
1. The first person to discover " magnetic declination ". Historically speaking, senior Shen Kuo of Song Dynasty was the founder of "magnetic declination" in the world, but he was not really the founder of "magnetic declination", but Ma He, but Ma He did not study it carefully.
"Ping Long Recognition"
2. The first person in the world to discover oxygen . Chapter 3 of the book "Ping Long Recognition" records that "Zhen Qi" exists in space, and "Zhen Qi" can be divided into "Yin Qi" and "Yang Qi". It also classifies that there are many methods to force out "Yin Qi", such as heating bluestone, saltpeter, etc. Ma He also mentioned that "Yin Qi" also exists in water, but because the Yin and Yang are closely combined in the water, a It is difficult to extract "Yin Qi" with ordinary methods...
Magnetic declination
After subsequent research, it was found that the Yin Qi here is actually oxygen. This proves that China knew the existence of oxygen and was able to decompose it as early as the Tang Dynasty, more than 1,000 years before Europeans discovered oxygen.
