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The Chinese Sky

In ancient China, it was believed that events in the sky directly reflected events on earth. If, for example, a comet suddenly appeared in the sky it was thought that something important and unexpected was about to happen on earth, perhaps something like a major battle. The emperor was believed to be the Son of Heaven who had been given the Mandate, or right to rule, by Heaven itself. It was vital that he could prove that he retained this right by predicting the movements of the sky accurately. His astronomers were therefore expected to watch the sky very carefully and they kept accurate records of the movements of the stars and planets, recording events such as Halley’s comet and various eclipses of the sun and moon.

Halley’s comet appears in the sky every seventy to seventy-five years, so very few people see it more than once in their lifetime. Over time, Chinese astronomers recorded every instance of Halley’s comet from 3000 years ago, the only civilisation in the world to have done so. They also made drawings of how the comet looked each time.

The emperor’s astronomers were also responsible for producing the calendar each year, a document commonly known as an almanac. No one else was allowed to calculate a calendar. It contained predictions of major events in the sky, which affirmed the emperor’s divine link to the heavens and ultimate power. Royal astronomers were in a difficult position. If they failed to predict an event like an eclipse then the emperor’s power might appear diminished and political rivals could take it as an opportunity to rebel. When dynasties fell, it was therefore believed that Heaven had directly intervened to give the responsibility of rule – or mandate - to a more worthy line. The job of royal astronomer therefore carried both huge responsibility for informing important political decisions, and severe penalties for mistakes.

The Regions of the Sky

The Chinese sky was divided into five great regions or palaces called gong 宫. These were equated with the directions north, south, east and west and also with a middle region. The middle region was the most important as it housed among its stars the celestial image of the emperor surrounded by his family and civil and military officials. This part of the sky has constellations such as ‘the prince’, ‘the concubine’, and ‘the throne’ and is a reflection of life on earth.

The rest of the sky contains the equatorial constellations grouped in the four directions, each associated with an animal and a colour. In addition, Chinese astronomers identified twenty-eight segments in the sky known as mansions or lunar lodges and called xiu 宿 in Chinese. The exact origin of the mansions is not known. It is possible that they once marked coordinates through which the moon passed during its monthly journey around Earth and served as a way of tracking the its progress. However, later the mansions were used rather to measure the coordinates of celestial bodies along the equator in the Chinese system. Many of the most important Chinese constellations are situated within these twenty-eight mansions.

The Chinese tradition of associating animals with the four points of the compass has a long history. The animals of the four directions are first mentioned in an ancient Chinese manual of divination, The Book of Changes (Yijing 易经). Here, a map of the heavens, Sifang 四方, shows mystical animals holding court over not only the directions of the earth, but also over the seasons of the year.

On a Chinese star map each of the four directions contains seven of the twenty-eight mansions and together with the central region of the sky, synonymous with the emperor, and therefore China itself, these regions make up what are known as the five cardinal points. It is important to note that these four animals are entirely unrelated to the twelve animals of the Chinese zodiac but they do have their own important associations and properties:

• The Black Tortoise, Xuan wu (玄武), represents both north and the winter; A symbol of longevity, the tortoise of the north is often depicted together with a snake. The union of these two creatures was thought to have created the earth. It is also associated with the element water.
• The Blue Dragon, Qing long (青龙), represents both east and the spring; Unlike in western mythology, the dragon is rarely depicted as a malevolent force but generally considered to be both benevolent and auspicious. It is also often associated with the emperor and therefore linked to the Red Bird, whose own association is with the empress. The dragon is associated with the element wood.
• The Red Bird, Zhu que, (朱雀) represents the south and the summer; The bird is sometimes seen as a phoenix and associated with good fortune. It is also often paired with the dragon. It is associated with the element fire.
• The White Tiger, Bai hu, (白虎) represents the west and the autumn; The tiger is often seen as a protector and was thought to guard over the armies of the emperor and protect the spirits of the dead. It is associated with the element metal.

You can see how the constellations appear to form the shapes of the four animals here:

The Constellations

Looking at the map of the sky in the section above, we can see how the Chinese constellations are grouped into four directions, and also fall within one of the twenty-eight segmental divisions known as ‘mansions’ or lunar lodges. The most important Chinese constellations are situated very approximately along the celestial equator within the twenty-eight mansions and are seen highlighted in yellow. Although some of these constellations correlate loosely in appearance to groupings recognised in Europe, largely the patterns are quite different, as comparison with these western star maps will show.

The twenty-eight constellations of the Chinese sky are also important for astrological divination and have various linked meanings and associations. The first is the name of a famous general. According to legend, a terrible battle once broke out between two warring kingdoms. Twenty-eight great warriors came to the aid of the general. Although they were defeated, their names were given as a mark of respect to the heavenly constellations. Each constellation is also associated with an animal, and also with a particular day of the lunar cycle. It is believed that when the moon moves through these constellations on their designated days, fortunes relating to auspicious and inauspicious activities for the day should be observed. These associations are well documented in popular Chinese books and help advise people which days will prove the best for important plans such as marriage, burial, the watering of crops or the building of houses.

Take a look at the following image and the table below to identify the twenty eight circumpolar constellations and learn more about their associations and meanings.

REGION	CHINESE NAME		LOCATION ON MAP	ENGLISH NAME	WESTERN EQUIVALENT NAME	ASSOCIATED DATE	ASSOCIATED ANIMAL
The Blue Dragon of the East	Jiao	角	1	Horn	a Virg	Thurs 1st	Crocodile
	Kang	亢	2	Neck	k Vir	Fri 2nd	Dragon
	Di	氐	3	Root	a2 Lib	Sat 3rd	Badger
	Fang	房	4	Room	p Sco	Sun 4th	Hare
	Xin	心	5	Heart	s Sco	Mon 5th	Fox
	Wei	尾	6	Tail	m1 Sco	Tue 6th	Tiger
	Ji	箕	7	Winnowing basket	g Sgr	Wed 7th	Leopard
The Black Tortoise of the North	(Nan)Dou	斗	8	South Dipper	f Sgr	Thurs 8th	Unicorn
	Niu	牛	9	Ox /Herd boy	b Cap	Fri 9th	Buffalo
	Nü	女	10	Girl	e Aqr	Sat 10th	Bat
	Xu	虚	11	Emptiness	b Aqr	Sun 11th	Rat
	Wei	危	12	Rooftop	a Aqr	Mon 12th	Swallow
	Shi	室	13	House	a Peg	Tue 13th	Pig
	Bi	壁	14	Wall	g Peg	Wed 14th	Porcupine
The White Tiger of the West	Kui	奎	15	Legs	h And	Thurs 15th	Wolf
	Lou	婁	16	Bond	b Ari	Fri 16th	Dog
	Wei	胃	17	Stomach	41 Ari	Sat 17th	Pheasant
	Mao	昴	18	Hairy Head	h Tau	Sun 18th	Cockerel
	Bi	毕	19	Net	e Tau	Mon 19th	Crow
	Zui	觜	20	Turtle	l1 Ori	Tue 20th	Monkey
	Shen	参	21	Three stars	z Ori	Wed 21st	Gibbon
The Red Bird of the South	Jing	井	22	Well	m Gem	Thurs 22nd	Tapir
	Gui	鬼	23	Ghost	q Cnc	Fri 23rd	Goat
	Liu	柳	24	Willow	d Hyd	Sat 24th	Stag
	Xing	星	25	Star	a Hyd	Sun 25th	Horse
	Zhang	张	26	Extended Net	e1Hyd/m Hyd	Mon 26th	Ox
	Yi	翼	27	Wings	a Crt	Tue 27th	Snake
	Zhen	珍	28	Chariot	g Crv	Wed 28th	Worm

The Sun and Moon

Because one of the main purposes of astronomical observation in ancient China was timekeeping, the sun and moon were very important. The Chinese used a calendar system based on the phases of the moon (measured through observing the position of the stars in the twenty-eight mansions) and the time of the solar year, or season.

The superstitious belief that linked events on earth to those in the heavens made people very wary of events in the sky. Solar eclipses in particular were regarded with fear, and a common belief was that these occurred because a great dragon was attempting to devour the sun. The forewarning of such an event was therefore imperative so people could gather to shout, strike gongs, and scare away the dragon. Over generations of observation, astronomers discovered a relationship we now know as the Saros cycle, a cycle in which sun, moon and earth are aligned in a particular way approximately every 18 years, 11.3 days. This enabled them to predict solar and lunar eclipses with some accuracy but it was not an infallible system. In 2136 BC there was an unpredicted eclipse. Documentation about this event dates it as the earliest recorded eclipse in history but it also tells us about the fate of the court astronomers Xi 羲 and He 和 who failed to predict it in advance. Given the belief that such celestial events reflected events on earth and should be predicted by the emperor, complete accuracy was expected of court astronomers, and failure meant only one fate – execution.

The belief which linked celestial activity to that on earth is illustrated in an description of lunar behaviour by a court astronomer, Shishen 石申, in the fourth century BC :

When a wise prince occupies the throne, the moon follows the right way. When the prince is not wise and the ministers exercise power, the moon loses its way. When the high officials let their interests prevail over public interest, the moon goes astray toward north or south. When the moon is rash, it is because the prince is slow in punishing; when the moon is slow, it is because the prince is rash in punishing.

H. Maspero, ‘L'astronomie chinoise avant les Han’ [‘Chinese Astronomy before the Han Dynasty’], T'oung Pao 26 (1929): 288

The sun and moon have always had a special significance in Chinese folklore and various symbolism and myths surround them. The mid-Autumn, or Moon Festival is perhaps the second most important traditional festival in China after Chinese New Year. It is held on the fifteenth day of the eighth lunar month when the moon is said to be at its largest, roundest, and brightest of the year. The shape of the moon is said to represent completeness and perfection and its celebration is an important family occasion each year. Special round cakes, called moon cakes, are made to eat during the festival.

The sun and moon have developed a particular iconography in China. The red sun is often pictured with a three-legged crow and the moon features a white hare or rabbit, pounding a pestle and mortar. The association of the hare and the moon is common to folklore all over the world. One Buddhist jataka – stories about the Buddha in his earlier lives – tells that he was once a hare and sacrificed himself to the god Indra who was suffering from hunger. As thanks for his selflessness, Indra then immortalised the hare by placing his image on the moon for all to see. Another story tells of a white hare serving Chang E 嫦娥, the Queen of the moon. There are several versions of this myth that may explain the origin of these motifs.

Visit our myths page to learn more about these myths and other legends relating to the sky.

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