Star catalogueA star catalogue is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient people, including the Babylonians, Greeks, Chinese, Persians, and Arabs. They were sometimes accompanied by a star chart for illustration.
DunhuangDunhuang () is a county-level city in Northwestern Gansu Province, Western China. According to the 2010 Chinese census, the city has a population of 186,027, though 2019 estimates put the city's population at about 191,800. Sachu (Dunhuang) was a major stop on the ancient Silk Road and is best known for the nearby Mogao Caves. Dunhuang is situated in an oasis containing Crescent Lake and Mingsha Shan (, meaning "Singing-Sand Mountain"), named after the sound of the wind whipping off the dunes, the singing sand phenomenon.
ZodiacThe zodiac is a belt-shaped region of the sky that extends approximately 8° north and south (as measured in celestial latitude) of the ecliptic, which is the apparent path of the Sun across the celestial sphere over the course of the year. The orbital paths of the Moon and major planets are within the belt of the zodiac. In Western astrology, and formerly astronomy, the zodiac is divided into the following twelve signs: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces.
Chang'anChang'an (AUDzh-Changan.oggchang2.an1; ) is the traditional name of Xi'an. The site has been inhabited since Neolithic times, during which the Yangshao culture was established in Banpo, in what is now the city's suburbs. Furthermore, in the northern vicinity of modern Xi'an, Qin Shi Huang of the Qin dynasty, China's first emperor, held his imperial court and constructed his massive mausoleum guarded by the Terracotta Army. From its capital at Xianyang, the Qin dynasty ruled a larger area than either of the preceding dynasties.
Christianity in ChinaChristianity in China has been present since the early medieval period and it has gained a significant amount of influence during the last 200 years. The Syro-Persian Church of the East (frequently mischaracterized as Nestorianism) appeared in China in the 7th century, during the Tang dynasty. Catholicism was one of the religions patronized by the emperors of the Mongol-led Yuan dynasty, but it did not take root in China until it was reintroduced by Jesuit missionaries in the 16th century.
Earth's rotationEarth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Earth rotates eastward, in prograde motion. As viewed from the northern polar star Polaris, Earth turns counterclockwise. The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where Earth's axis of rotation meets its surface. This point is distinct from Earth's North Magnetic Pole.
AryabhataAryabhata ( ISO: ) or Aryabhata I (476–550 CE) was the first of the major mathematician-astronomers from the classical age of Indian mathematics and Indian astronomy. His works include the Āryabhaṭīya (which mentions that in 3600 Kali Yuga, 499 CE, he was 23 years old) and the Arya-siddhanta. For his explicit mention of the relativity of motion, he also qualifies as a major early physicist.
Foreign relations of imperial ChinaFor the later history after 1800 see History of foreign relations of China. The foreign relations of Imperial China from the Qin dynasty until the Qing dynasty encompassed many situations as the fortunes of dynasties rose and fell. Chinese culture had influenced neighboring and distant countries, while being transformed by outside influences as well as being conquered. During the Western Han dynasty, the Silk Road trade routes were established and brought Hellenistic Central Asia, Persia under the Parthian Empire, and South Asia into contact with the Chinese empire.
Chinese calendarThe traditional Chinese calendar is a lunisolar calendar which identifies years, months, and days according to astronomical phenomena. In China, it is defined by the Chinese national standard GB/T 33661–2017, "Calculation and Promulgation of the Chinese Calendar", issued by the Standardization Administration of China on May 12, 2017. Traditional Chinese calendar also known as these five titles: Nongli Calendar (traditional Chinese: 農曆; simplified Chinese: 农历; pinyin: nónglì; lit.
Chinese astrologyChinese astrology is based on traditional Chinese astronomy and the Chinese calendar. Chinese astrology flourished during the Han Dynasty (2nd century BC to 2nd century AD). Chinese astrology has a close relation with Chinese philosophy (theory of the three harmonies: heaven, earth, and human), and uses the principles of yin and yang, wuxing (five phases), the ten Heavenly Stems, the twelve Earthly Branches, the lunisolar calendar (moon calendar and sun calendar), and the time calculation after year, month, day, and shichen (時辰, double hour).
