Analysis of information sources in references of the Wikipedia article "Nebra sky disc" in English language version.
The synchronisation key of the first phase [of the Nebra disc] allowed the longer solar year (approximately 365 days) to be harmonised with the shorter lunar year (around 354 days). Each year in spring, the crescent moon passed close to the Pleiades, appearing with different widths, depending on the lunar phase. The appearance of a 4.5 day-old crescent moon next to the Pleiades, as shown on the Sky Disc, meant that an extra month should have been added, since the solar and lunar years differed by approximately one month after every three years.
Zudem vergehen bei einer 4,5 Tage alten Mondsichel nicht wie üblich 29 oder 30 Tage seit dem letzten Neulicht, sondern 32 Tage. Dies korrespondiert mit den 32 Sternen, die auf der Himmelsscheibe in der ersten Phase abgebildet waren, sodass die Schaltregel wohl sogar doppelt verschlüsselt in diesem auf den ersten Blick simplen Bildwerk dargestellt ist. Das große runde Goldobjekt könnte zugleich Vollmond und Sonne repräsentieren. Die 32 Sterne der ersten Phase verkörpern dann 32 Sonnenjahre, denen – zählt man Vollmond / Sonne hinzu – 33 Mondjahre entsprechen (Hansen 2007). English translation: "with a 4.5-day old crescent moon, not 29 or 30 days elapse since the last new light, as is usually the case, but 32 days. This corresponds with the 32 stars that were depicted on the sky disc in the first phase, so that the leap rule is probably even depicted in a doubly coded way in this, at first sight, simple pictorial work. The large round gold object could represent both the full moon and the sun. The 32 stars of the first phase then embody 32 solar years, to which - if one adds the full moon / sun - 33 lunar years correspond (Hansen 2007).
In the Nordic Bronze Age, sets of 7 and 28 appear on the Aspeberget rock carvings, one of which portrays a figure holding a sistrum-like object in its right hand, depicted by twenty-eight cup marks arranged in four rows of seven each. In his study devoted to ancient astronomy, Flemming Kaul suggested that it depicted the four lunar phases and the lunar months
synchronic analysis of Greek passages dealing with the journey of Helios reveals that the poetic image of the golden 'cup, vessel' hints at the solar boat.
the twin swords and axes in the Nebra hoard correspond to a widely shared ritual tradition of such depositions, which are the material correlates of the Divine Twins in Bronze Age ritual. This idea is further supported by the Nebra disc that links the Divine Twins (twin axes and swords) and the sun cult together, and thus confirms their intimate relation. ... [the Divine Twins] are also said to represent the morning and evening star, and the twin stars in the constellation of Gemini. This constellation, which belongs in the winter sky, could possibly be identified in the lower part of the Nebra disc, as it consists of 8 stars in a formation much like what we see on the disc.
Ker and his colleagues found the pair of acute angles of the basic diamond pattern [of the Bush Barrow lozenge] to be 81°. They realized that this was the angle between midsummer and midwinter sunrises (and sunsets of course) on a low horizon at the latitude of Stonehenge (51.17° N) four thousand years ago. ... The Nebra disc and the Bush Barrow lozenge both seem to be designed to reflect the annual solar cycle at about latitude 51° north, and both have elements in their design which could refer specifically to the solar calendar.
This phase also includes the hoard of Nebra with its famous disc showing gold-plated heavenly bodies. Its plating technique is generally connected to Mycenaean metalwork. It will be shown, however, that this technique together with that of metal inlay had its origins in Britain, where it was already applied to organic material during the first phase of the Early Bronze Age, and flourished during the second and third phases when it was introduced on the continent and used on prestige metalwork.
In the first phase, the disc showed the night sky with 32 gold stars, including the Pleiades, a gold orb representing the sun or a full moon, and a crescent moon. It served as a reminder of when it was necessary to synchronize the lunar and solar years by inserting a leap month. This phenomenon occurred when the three-and-a-half-day-old moon—the crescent moon on the disc—was visible at the same time as the Pleiades. 'The astronomical rules that are depicted wouldn't be imaginable without decades of intensive observation,' says Harald Meller, director of the State Museum for Prehistory in Halle. 'Until the Sky Disc was discovered, no one thought prehistoric people capable of such precise astronomical knowledge.'
Gold vessels in the Eberswalde hoard bear sun and circular symbols like those on the Berlin gold hat. Some of these contain calendrical information as well. The base of a bowl [from the Eberswalde hoard] is formed from ten, or counting the centre disc, eleven concentric circles topped by a band of 22 circular discs. This corresponds to the number of solar years (10+22=32) and together with the centre disc the number of lunar years (11+22=33) until the solar and lunar calendars are in alignment.
The scene on the ring [from Mycenae] shows the sun, the moon, and what looks like the Milky Way on the sky, as well as the "Poppy Goddess" seated under a tree [...] The poppy flower of the Minoan 'Poppy Goddess' was associated in Classical Greek art with many goddesses, but, especially, it was the symbol of Demeter, who as the great mother and fertility goddess had a cult that had its origin in Minoan-Mycenaean times [...] as the Palaikastro mould shows, the Poppy Goddess was not only a chthonic fertility goddess, but also the goddess of celestial cycles.
This article discusses the jewellery worn by the goddess Freyja, the Brisingamen. ... its origin may have been the Menet (alternatively Menat or Menit) – originally the necklace of the cow god Hathor which in the Greco-Roman time was taken over by the fertility goddess Isis.
{{cite journal}}: CS1 maint: DOI inactive as of February 2025 (link)waving lines ... cut off the upper part of the field on the great signet of Mycenae, and contain above their curve a rayed disk and crescent representing the heavenly luminaries. ... the seated Goddess, whose character is there marked by the double-axe as well as by the celestial symbols, holds poppy-heads presented to her by a votary.
each of the trilithons could be considered conjoined deities, pairs of gods, or an early form of the Divine Twins born at the same time from a single union (Darvill 2006, 144–145). The Great Trilithon to the southwest is the largest and most prominent. It is set astride the principal axis and might cautiously be identified with a pair of deities representing day and night, the sun and moon, summer and winter, life and death, perhaps even the prehistoric equivalents of the twins Apollo and Artemis as they are known in later pantheons across the Old World.
The potential observation of the horizon arc described by the Sun during its annual motion is exemplified by another impressive find from the Early Bronze Age: A diamond-shaped gold plaque of extraordinary quality was excavated in a burial under Bush Barrow in Wiltshire, southern England, less than a mile away from Stonehenge. ... Both objects, the Nebra Sky Disc and the Bush Barrow Lozenge, are unique in their appearance, but they may be related in their ritual and possibly astronomical relevance.
Ker and his colleagues found the pair of acute angles of the basic diamond pattern [of the Bush Barrow lozenge] to be 81°. They realized that this was the angle between midsummer and midwinter sunrises (and sunsets of course) on a low horizon at the latitude of Stonehenge (51.17° N) four thousand years ago. ... The Nebra disc and the Bush Barrow lozenge both seem to be designed to reflect the annual solar cycle at about latitude 51° north, and both have elements in their design which could refer specifically to the solar calendar.
waving lines ... cut off the upper part of the field on the great signet of Mycenae, and contain above their curve a rayed disk and crescent representing the heavenly luminaries. ... the seated Goddess, whose character is there marked by the double-axe as well as by the celestial symbols, holds poppy-heads presented to her by a votary.
Demeter ... she of the golden double-axe
waving lines ... cut off the upper part of the field on the great signet of Mycenae, and contain above their curve a rayed disk and crescent representing the heavenly luminaries. ... the seated Goddess, whose character is there marked by the double-axe as well as by the celestial symbols, holds poppy-heads presented to her by a votary.
{{cite journal}}: CS1 maint: DOI inactive as of February 2025 (link)waving lines ... cut off the upper part of the field on the great signet of Mycenae, and contain above their curve a rayed disk and crescent representing the heavenly luminaries. ... the seated Goddess, whose character is there marked by the double-axe as well as by the celestial symbols, holds poppy-heads presented to her by a votary.
each of the trilithons could be considered conjoined deities, pairs of gods, or an early form of the Divine Twins born at the same time from a single union (Darvill 2006, 144–145). The Great Trilithon to the southwest is the largest and most prominent. It is set astride the principal axis and might cautiously be identified with a pair of deities representing day and night, the sun and moon, summer and winter, life and death, perhaps even the prehistoric equivalents of the twins Apollo and Artemis as they are known in later pantheons across the Old World.
The potential observation of the horizon arc described by the Sun during its annual motion is exemplified by another impressive find from the Early Bronze Age: A diamond-shaped gold plaque of extraordinary quality was excavated in a burial under Bush Barrow in Wiltshire, southern England, less than a mile away from Stonehenge. ... Both objects, the Nebra Sky Disc and the Bush Barrow Lozenge, are unique in their appearance, but they may be related in their ritual and possibly astronomical relevance.
Ker and his colleagues found the pair of acute angles of the basic diamond pattern [of the Bush Barrow lozenge] to be 81°. They realized that this was the angle between midsummer and midwinter sunrises (and sunsets of course) on a low horizon at the latitude of Stonehenge (51.17° N) four thousand years ago. ... The Nebra disc and the Bush Barrow lozenge both seem to be designed to reflect the annual solar cycle at about latitude 51° north, and both have elements in their design which could refer specifically to the solar calendar.
{{cite web}}: CS1 maint: numeric names: authors list (link)each of the trilithons could be considered conjoined deities, pairs of gods, or an early form of the Divine Twins born at the same time from a single union (Darvill 2006, 144–145). The Great Trilithon to the southwest is the largest and most prominent. It is set astride the principal axis and might cautiously be identified with a pair of deities representing day and night, the sun and moon, summer and winter, life and death, perhaps even the prehistoric equivalents of the twins Apollo and Artemis as they are known in later pantheons across the Old World.
Apollo and Artemis were (they say) children of Dionysus and Isis, and Leto was made their nurse and preserver; in Egyptian, Apollo is Horus, Demeter Isis, Artemis Bubastis. It was from this legend and no other that Aeschylus son of Euphorion took a notion which is in no poet before him: that Artemis was the daughter of Demeter.
The Nebra Sky Disc is dated to the early Bronze Age. It was made circa 1800 BC and was in use over several generations until around 1600 BC when it was buried and dedicated to the gods.
In its next phase of use, a third gold arc was added to the Sky Disc. Unlike the two solstice arcs, this addition did not serve to mark a particular celestial observation. It appears to be a representation of a 'sun ship'. ... Short feathered lines on each side of the gold sun boat on the Nebra Sky Disc may represent the oars of a crew.
both the gold arcs [on the Nebra disc] occupy a very precise angle of between 82 and 83 degrees, a figure that is well beyond the error expected if a right angle was intended. The reason for this seems to be connected to observations of the sun. The arcs mark the full range of points on the horizon at which the sun sets and rises in a solar year. The terminal of each arc inscribes the summer solstice sunrise and sunset and the winter solstice sunrise and sunset as seen from the latitude of the Mittelberg 3,600 years ago. ... The marking of solstice sunrise and sunset at monuments such as Stonehenge was about the expression of religious and symbolic ideas linking the monument to the cycles of the cosmos. The same concerns were probably true of the Sky Disc, which had the benefit of being a portable and possesable object.
(on the disc) there is a distinctive rosette of seven stars clustered between the full and crescent moons. These are identified as the Pleiades or Seven Sisters, recognised by many world cultures as calendar stars, since they are last seen in the night sky in March and only reappear again in October. ... The path of the sun provides a measure of the time of day and year, while the moon can do the same in measuring out months and weeks based on its regular cycles. A problem arises, however, when it comes to equating the solar and lunar years. The former is eleven days longer than the later and after three years the difference is equivalent to about a month. To bring the two calendars into harmony a rule is needed. The first written record of such a rule comes from a Babylonian cuneiform tablet dating to the seventh or sixth centuries BC, which advises to add a leap month every third year if no new moon appears next to the Pleiades in the spring but rather a crescent moon a few days old. That arrangement of heavenly bodies is precisely what the Sky Disc seems to show, reflecting an ingenious materialisation of a complex astronomical and calendrical rule without the need for writing.
{{cite book}}: CS1 maint: location missing publisher (link)The Greek poet Hesiod, writing in c. 700 BC, noted that '[w]hen the Pleiades rise it is the time to use the sickle, but the plough when they are setting'. Their disappearance and appearance has been seen historically as a marker of the beginning and end of the farming year in Europe [...] In the region of Germany where the disc was found, the Pleiades is last seen in the sky on 10 March, alongside the young, crescent moon. The full moon accompanies the reappearance of the constellation on 17 October. On the disc, the Pleiades is tellingly placed between the crescent and full moons, suggesting an awareness of this celestial rhythm.
{{cite book}}: CS1 maint: location missing publisher (link)The point at the top and the bottom [of the Bush Barrow gold lozenge] has a very precise angle of 81 degrees. That's the same angle between where the sun rises at midwinter and midsummer solstices, so it has an astronomical importance. And the very finely detailed embossed decoration, particularly around the outer border, is laid out to a tolerance of less than half a millimetre. What that tells us is they understood astronomy, geometry and mathematics, 4,000 years ago.
