Gander (a native of Qi State in the Warring States Period): a famous astronomer in the pre-Qin period, who lived in the middle of the 4th century BC, was the compiler of the oldest catalog in the world and the earliest discoverer of Europa.

Compile the oldest catalogue in the world

Liu Xin (a man at the end of the Western Han Dynasty): Zi Zijun, a great astronomer, made great contributions to astronomy.

The earliest astronomical almanac in the world, scholars who have made important contributions to the classification and arrangement of ancient books in China, also have extraordinary experiences in politics.

Luoxiahong (2nd century BC-BC 1 century): Langzhong (now Langzhong, Sichuan) was a folk astronomer. Compile the "Early Calendar"

Zhang Heng (78 ~ 139), a scientist, astronomer and philosopher in the Eastern Han Dynasty, was born in Xi 'e, Nanyang, Henan Province (now Shiqiao, nanzhao county, Henan Province). Proficient in astronomy and calendar calculation, on the basis of previous studies, he invented the world's earliest hydraulic rotary armillary sphere and seismograph for measuring earthquakes. In astronomical theory, Zhang Heng is the main representative of Huntian School. As for the origin of heaven and earth, he thinks that before heaven and earth were divided, it was chaos. After the division, the light ones ascend to heaven, while the heavy ones condense into earth, and the yin and yang sway to produce everything. He also correctly explained the cause of the eclipse for the first time, thinking that moonlight is the reflection of the sun's light, and the eclipse is caused by the moon entering the shadow of the earth. He affirmed the materiality and infinity of the universe according to his astronomical knowledge at that time.

Liu Hong (AD 129-2 10) was an astronomer in the Eastern Han Dynasty. He has held many official positions and made remarkable achievements, but his main achievement is in astronomical calendar. His "Ganli" established many calendar concepts and classic calendar calculation methods, which is the symbol of the final formation of the ancient calendar system in China and has epoch-making significance.

Yu (AD 28 1-356): Zhong, a native of Huiji (now Yuyao, Zhejiang), was an astronomer in the Eastern Jin Dynasty, who inherited and developed the theory.

Zu Chongzhi (AD 429-500): A native of Laiyuan County, Hebei Province in the Northern and Southern Dynasties, he read many books on astronomy and mathematics since childhood, studied hard and practiced hard, and finally made him an outstanding mathematician and astronomer in ancient China.

Zhang Sui (a monk and his party, 673-727 AD) was born in Changle, Weizhou (now Nanle County, Puyang City, Henan Province) in the Tang Dynasty. Zhang Sui was gifted, studious and well-read since childhood. /kloc-the positions of more than 0/50 stars were re-determined by instruments such as "Huntian Bronze Instrument" and "Zodiac Patrol Instrument", and the degrees of 28 nights away from the north pole of the celestial sphere were determined many times. So as to find the stars moving. According to this fact, Zhang Sui deduced that the stars on the celestial body must be moving. So he overthrew the previous conclusion that stars were motionless, and Zhang Sui became the first person to discover the movement of stars in China.

Guo Shoujing (1231━1316), a famous astronomer, hydraulic scientist and mathematician, was born in Xingtai, Shunde, Yuan Dynasty. He pays attention to astronomical practice and is good at making instruments. He created and improved more than ten kinds of instruments for observing celestial phenomena, such as simple instrument, upright instrument, high table, waiting table, landscape symbol and peeping instrument. At the same time, he set up 27 observation stations all over the country to carry out large-scale measurement, re-observed the positions of 28 constellations and other constant stars, and determined the ecliptic angle, which achieved extremely high accuracy. He died at the age of 85.

In addition, there are many scholars and experts who have made great contributions to astronomical research in the world, which deserve the affirmation of all mankind, so I won't list them here.