How Ancient Cultures Saw the Milky Way: Rivers, Roads, Spilled Milk and an Emu Made of Darkness

Step away from city lights on a clear, moonless night and a pale, uneven band runs from one horizon to the other. It is our own galaxy seen edge-on from the inside: hundreds of billions of stars too faint and distant to pick out one by one, broken by long lanes of dark dust. Nobody before the seventeenth century knew that. But almost everybody who lived before electric light saw it, every clear night of their lives, and almost every culture that left us stories, paintings or star lore found something to say about it.

What they said varies more than you might expect. To some the Milky Way was a river, to others a road for the dead, a spine, a trail of spilled meal or ashes, or a stream of milk. Some peoples looked past the bright band entirely and drew their figures in the dark gaps. And in a few famous cases, including ancient Egypt, scholars are still arguing about whether the Milky Way appears at all. Here is a tour of the best-documented traditions, with the uncertain parts marked as uncertain.

Aboriginal Australia: an emu made of darkness

The most celebrated example of reading the dark rather than the light comes from Aboriginal Australia. Many communities across the continent describe an Emu in the Sky, but it is not made of stars. Its head is the Coalsack, the dark cloud beside the Southern Cross, and its long neck and body follow the dust lanes that run through Centaurus and Scorpius. Viewed from the Southern Hemisphere, those lanes look a lot like a running bird.

The emu is not just a picture. In the work that astronomers Ray Norris and Duane Hamacher have documented with Aboriginal communities, the sky emu changes position through the year, and its position in the evening sky is tied to the season when real emus lay their eggs, a time for collecting them. Norris and Hamacher also examined a rock engraving of an emu on the Elvina Track in Ku-ring-gai Chase National Park, north of Sydney, whose legs trail behind it like the sky emu’s. At the time of year when emus are nesting, the celestial emu stands above the engraving in the evening sky. The authors call a deliberate link “quite possible” rather than proven, which is the right tone: the alignment is striking, but nobody recorded the engravers’ intentions.

Other figures share the same dark-cloud approach. The Wardaman elder and author Bill Yidumduma Harney has described a Sky Boss whose head is associated with the Coalsack, and he connects the Milky Way with the Rainbow Serpent. Hamacher himself has since urged colleagues to be rigorous here, because confident claims about Aboriginal astronomy sometimes outrun the evidence. Aboriginal knowledge is diverse, held by hundreds of distinct nations, and it is often restricted. No single version speaks for the whole continent.

China: the River of Heaven

In Chinese tradition the Milky Way is a river: Tiānhé (天河), the River of Heaven, also called Yínhé (银河), the Silver River. Its best-known story separates two lovers. The Weaver Girl (Zhīnǚ), a heavenly weaver identified with the bright star Vega, falls in love with the Cowherd (Niúláng), identified with Altair. Because their marriage keeps them from their duties, they are placed on opposite banks of the river and allowed to meet only once a year, when magpies form a bridge across it. That night, the seventh of the seventh lunar month, is still celebrated as the Qixi festival. Anyone can check the geometry: Vega and Altair really do sit on either side of the bright summer stretch of the Milky Way.

Chinese astronomy was also mapped with unusual care, and one atlas survives from more than 1,300 years ago. The Dunhuang star chart, found among the manuscripts sealed in a cave at Dunhuang and now in the British Library, plots 1,339 stars in 257 asterisms across twelve maps of the sky plus a circumpolar map. A study by Jean-Marc Bonnet-Bidaud, Françoise Praderie and Susan Whitfield dated it to about 649–684. They found the brightest stars placed to within a few degrees and concluded that precise mathematical methods were used to draw it. It is the oldest complete star atlas known from any civilisation. It is worth being precise about one point that often gets garbled: the chart plots stars and asterisms, and it does not draw the Milky Way itself.

Ancient Egypt: Nut, the Duat and an unsolved question

Egypt gives us some of the most beautiful sky imagery from the ancient world, and the most honest answer about the Milky Way is that we do not know for sure what the Egyptians called it. The central image is not in doubt. The sky was the goddess Nut, shown as a long female body arched over the earth, her fingertips touching one horizon and her toes the other. Beneath her the air god Shu holds her up, and the earth god Geb lies below. Her body is often covered in stars.

Nut was also the route the sun took through the night. In a composition now called the Fundamentals of the Course of the Stars (older books call it the Book of Nut), Nut swallows the sun in the west each evening. It travels through her body during the night, through the Duat, the hidden realm of the night and the dead, where it is renewed in union with Osiris. At dawn she gives birth to it again in the east. The composition survives on the ceiling of the cenotaph of Seti I at Abydos, in the tomb of Ramesses IV, and in later versions. The idea of the night sky as a body that the sun and the dead pass through made Nut central to funerary religion. In the Pyramid Texts, the dead king is promised that he will rise to the sky and travel through it, and in one spell he says: “Nut is the one who made a path for me.”

That path is where the Milky Way comes in, maybe. Egyptologists have proposed several Egyptian terms for it. The leading candidates are a phrase that Kurt Sethe rendered as “Street of Stars” and James Allen as “Beaten Path of Stars”, and a “Winding Waterway” that Virginia Lee Davis proposed in 1985. Others, including Rolf Krauss, read the same words as the ecliptic, the sun’s yearly path, rather than the Milky Way. A 2024 review by the astronomer Or Graur in the Journal of Astronomical History and Heritage sums up the state of play bluntly: no clear name, depiction or description of the Milky Way has yet been identified in Egyptian texts. Earlier attempts to find it in Nut’s imagery also disagree with one another.

Graur’s own suggestion is that Nut and the Milky Way were linked visually rather than by a name. Simulating the Egyptian sky, he notes that on winter evenings the Milky Way runs across the sky in a way that could mirror Nut’s outstretched arms. In summer, the bright band of the Milky Way could trace her torso and backbone. He also points to a passage in the Fundamentals that has migrating birds arriving from Nut’s northwestern side. Many cultures link the Milky Way to bird migration, from the Finnish name Linnunrata, the birds’ path, to similar ideas elsewhere. It is an attractive argument, and Graur presents it as a proposal, not a settled fact. The Coptic name for the Milky Way sometimes quoted as Egyptian, the Way of Chaff, is most likely a later borrowing from Arabic.

You can see why the question tempts people when you stand under one of the royal tomb ceilings. In the burial chamber of Ramesses VI in the Valley of the Kings, two enormous figures of Nut stretch back to back along the vault. One carries the Book of the Day and the other the Book of the Night, with the sun’s boat moving along them past rows of gods and stars. At the Temple of Hathor at Dendera, carved and painted under the Ptolemies and Romans, a painted ceiling shows the sun Nut has just given birth to, its rays falling on the head of Hathor. These are pictures of the sky as a living body. Whether the Egyptians also saw the Milky Way in that body is the part that remains open.

Mesopotamia: a gap in the record

Babylonian and Assyrian scholars kept some of the most systematic star records of the ancient world, from star lists and omen series to centuries of astronomical diaries. You might expect the Milky Way to be prominent in them. In fact no Mesopotamian name for it has been securely identified. Earlier scholars proposed candidates, among them a study by Unger linking it to the god Marduk and the term Neberu, and an essay by Robert Brown on the Milky Way in “Euphratean” star myth. None has won general acceptance. The honest summary is that the Milky Way probably had a name in cuneiform, but we cannot point to it with confidence.

Greece and Rome: a circle of milk

Our own name comes from Greek. The Greeks called it the galaxias kyklos, the milky circle, from gala, milk, and that word gives us galaxy. The Romans said via lactea, the milky road. The stories behind the name come in several versions, and the Roman writer Hyginus, in his handbook of star myths, collected four of them. In one, Hera (Juno) unknowingly nurses the infant Hermes, and when she realises whose child he is, she pushes him away and her milk spills across the sky. In the best-known version, the infant Heracles is put to the breast of the sleeping Hera so that he will gain immortality, and the milk sprays out when she wakes and pulls away. Another says the greedy baby Heracles simply drank more than he could hold. The fourth involves Rhea and the stone she gave Cronus in place of the infant Zeus.

Peter Paul Rubens painted the Heracles version around 1636–1638 for Philip IV of Spain’s hunting lodge, the Torre de la Parada, and the painting now hangs in the Prado. It is a reminder that this myth had a long afterlife in European art, long after anyone took it literally.

Greek philosophers argued about what the band actually was. Aristotle’s Meteorology reports that some Pythagoreans tied it to Phaethon’s scorching ride in the Sun’s chariot, and that Anaxagoras and Democritus said it was the light of stars. Aristotle rejected the star explanation and treated the Milky Way as a phenomenon of the upper air. The star theory was right. Galileo confirmed it in 1610 when his telescope resolved the glow into countless faint stars.

Some peoples looked past the bright band entirely and drew their figures in the dark gaps.

The Maya: a road to the underworld and a tree at the centre

Among the Maya, the Milky Way was closely tied to roads and to the realm of the dead. In the K’iche’ Maya Popol Vuh, the hero twins’ father and uncle come to a crossroads on their way to Xibalba, the underworld, and take the Black Road. Following Dennis Tedlock’s work with K’iche’ speakers, this is widely read as the dark rift that splits the bright Milky Way, called in K’iche’ the road to Xibalba (often given as Xibalba be). Ethnographers working among Yukatek Maya have recorded the Milky Way described as a white road, sak beh, and as a route travelled by the dead. Lacandón Maya speakers also describe a white way.

A more ambitious reading came from David Freidel, Linda Schele and Joy Parker in their 1993 book Maya Cosmos. They argued that Classic Maya imagery of the World Tree, the axis that joins the underworld, the earth and the heavens, corresponds to the Milky Way standing upright in the sky, and that other phases of the band were read as a canoe or a crocodile. The book has been hugely influential, but many specialists consider parts of it speculative, so treat the World Tree identification as an interpretation, not a decipherment. The surviving Maya books, such as the Paris Codex, show sky bands and celestial creatures. They prove the Maya charted the heavens carefully but do not label the Milky Way for us.

The Andes: a river with animals in it

Andean astronomy is the great example of dark-cloud constellations outside Australia. In the 1970s the anthropologist Gary Urton lived in Misminay, a Quechua-speaking community near Cusco, and recorded how people there read the night sky. The Milky Way is Mayu, the river, and the dark patches along it are animals, called in Quechua yana phuyu, dark clouds. They include a serpent, a toad, a tinamou (a partridge-like bird), a fox, and the largest figure, Yacana, the llama. Yacana has a calf, and the bright stars Alpha and Beta Centauri are its eyes, llamacñawin.

In Urton’s account, the celestial river is linked to the circulation of water between the earth and the sky. The dark-cloud animals appear and disappear with the seasons, in step with the lives of their earthly counterparts. Because the Inca Empire’s capital was Cusco, it is tempting to treat this as Inca astronomy pure and simple. That is a reasonable inference, supported by colonial-era sources mentioning a celestial llama, but it rests on modern fieldwork projected back across five centuries.

Southern Africa: ashes, a spine and the sun’s path

Some of the most poetic Milky Way stories come from southern Africa. Among the |xam San of the Cape, the nineteenth-century linguists Wilhelm Bleek and Lucy Lloyd recorded a story of a girl of the early race who threw wood ashes into the sky to make the Milky Way, so that people could see their way home at night. She also threw edible roots, which became stars, some red and some white. The story was told in 1873 by ||kabbo, who had learned it from his mother.

Other San traditions offer different pictures. The Ju|’hoansi (!Kung) of the Kalahari have been recorded calling the Milky Way the backbone of the night. The G|wi of Botswana describe the sun travelling along it. Like the Aboriginal emu, these are not one tradition but many, recorded from particular people at particular times.

North America: the dog’s trail and the spirit road

The Cherokee story, recorded by the ethnographer James Mooney and published in 1900, explains the Milky Way as spilled cornmeal. People noticed that someone was stealing meal from their mill, which in the story lay in the south, and found dog tracks. They lay in wait, and when the dog came back they whipped it. It ran off howling to the north with meal pouring from its mouth, leaving a white trail across the sky. The Cherokee name, as Mooney spells it, Gi’lï’-utsûñ’stänûñ’yï, means “where the dog ran”.

For many Plains peoples, the Milky Way was the road of the dead. The Lakota call it Wanáǧi Thacháŋku, the spirit road. Cheyenne and Pawnee traditions likewise connect it with the journey of souls or the presence of ancestors. The idea recurs so often across the Americas, from the Plains to the Maya, that it is one of the most widespread interpretations of the Milky Way anywhere.

Polynesia: the long fish

Polynesian navigators knew the sky as working knowledge, and Māori tradition names the Milky Way Te Ikaroa, the long fish. Te Ara, the Encyclopedia of New Zealand, records it among the major features of the Māori night sky. As elsewhere in Polynesia, names and stories vary between islands and between tribal groups, and much of the detail was handed down orally, so later written versions are best read as particular tellings rather than a single canon.

The Norse: what isn’t there

You will often read that the Vikings saw the Milky Way as Bifröst, the bridge to the gods, or as a road to Valhalla. The surviving sources do not say that. In Snorri Sturluson’s Prose Edda, written in Iceland in the thirteenth century, Bifröst is clearly the rainbow: Snorri even has his narrator say “it may be that ye call it rainbow”. There is no secure Old Norse myth about the Milky Way at all. Modern Scandinavian languages have folk names, such as the Swedish Vintergatan, the winter street, but those are not evidence for Viking-age belief. The honest entry for the Norse is a blank, and it is more interesting to say so than to fill it with a modern invention.

Reading the same sky

Put these traditions side by side and some patterns stand out. A river is one of the most common readings, from China to the Andes. A road, especially a road for souls, is another, across the Americas and beyond. The idea of the Milky Way as milk, which feels universal to English speakers, is in fact a Greek inheritance. And the dark lanes that astronomers now know as interstellar dust were, for Aboriginal Australians and Andean farmers, as meaningful as any star.

There are also limits to what can honestly be said. Some of the most-repeated claims, including a Milky Way Bifröst, a firm Egyptian name for the band, or a Babylonian Milky Way god, outrun the evidence. Many of the richest accounts come from ethnographers working in the nineteenth and twentieth centuries, which tells us what particular people believed then, not necessarily what their ancestors believed a thousand years earlier. Even so, the record is remarkable. Wherever people could see the night sky, they took that faint band and made it part of how they explained the world, the seasons and death. Most of us now have to drive an hour or more to see it at all.

Further reading