Набта Плая: Нұбия шөліндегі ежелгі өркениет іздері

Region of archaeological sites in the Nubian Desert

Nabta Playa was once a large endorheic basin in the Nubian Desert, located approximately 800 kilometers south of modern day Cairo or about 100 kilometers west of Abu Simbel in southern Egypt, 22.51° north, 30.73° east.

Although today the western Egyptian desert is totally dry, this was not always the case. There is good evidence that there were several humid periods in the past (when up to 500 mm of rain would fall per year), the most recent one during the last interglacial and early last glaciation periods which stretched between 130,000 and 70,000 years ago. During this time, the area was a savanna and supported numerous animals such as extinct buffalo and large giraffes, varieties of antelope and gazelle. Beginning around the 10th millennium BC, this region of the Nubian Desert began to receive more rainfall, filling a lake. According to Michael Brass (2018) early cattle remains from Nabta Playa were wild hunted aurochs, whilst domesticated cattle were introduced to northeast Africa in the late 7th millennium BC, originating from cattle domesticated in the Euphrates valley. Larger settlements began to appear at Nabta Playa by the 7th millennium BC, relying on deep wells for sources of water. Many large hearths also appear. Pottery decorations included complex patterns of impressions applied with a comb in a rocking motion. Some researchers, including Christopher Ehret, have suggested a Nilo Saharan linguistic affinity for the Nabta people.

Archaeological discoveries reveal that these New Stone Age peoples seem to have lived more organized lives than their contemporaries nearer to and in the Nile Valley. "Calendar circle" may be a misnomer as the spaces between the pairs of stones in the gates are a bit too wide, and the distances between the gates are too short for accurate calendar measurements." An inventory of Egyptian archaeoastronomical sites for the UNESCO World Heritage Convention evaluated Nabta Playa as having "hypothetical solar and stellar alignments."

Astrophysicist Thomas G. Brophy suggests the hypothesis that the southerly line of three stones inside the Calendar Circle represented the three stars of Orion’s Belt and the other three stones inside the calendar circle represented the shoulders and head stars of Orion as they appeared in the sky. These correspondences were for two dates – circa 4800 BC and at precessional opposition – representing how the sky "moves" long term. Brophy proposes that the circle was constructed and used circa the later date, and the dual date representation was a conceptual representation of the motion of the sky over a precession cycle. Near the Calendar Circle, which is made of smaller stones, there are alignments of large megalithic stones. The southerly lines of these megaliths, Brophy argues, aligned to the same stars as represented in the Calendar Circle, all at the same epoch, circa 6270 BC. Brophy argues that the Calendar Circle correlation with Orion's belt occurred between 6400 BC and 4900 BC, matching radio carbon dates of some campfires in the area. responded to the work of Brophy and Rosen, in particular their claims for an alignment with Sirius in 6088 BC and other alignments which they dated to 6270 BC, saying that these dates "are about 1500 years earlier than our best estimates for the Terminal Neolithic and the construction of megalithic structures" at Nabta Playa. However, according to Malville, Schild et al. (2007) the dates proposed by Brophy are inconsistent with the archaeological evidence, and "inference in archaeoastronomy must always be guided and informed by archaeology, especially when substantial field work has been performed in the region". They also concluded that, on closer inspection, the C line of megaliths "consists of stones resting on the sides and tops of dunes and may not represent an original set of aligned stele". They propose that the area was first used as what they call a "regional ceremonial centre" around 6100 BC to 5600 BC with people coming from various locations to gather on the dunes surrounding the playa where there is archaeological evidence for gatherings that involved large numbers of cattle bones, as cattle were normally only killed on important occasions. Around 5500 BC a new, more organised group began to use the site, burying cattle in clay lined chambers and building other tumuli. Around 4800 BC a stone circle was constructed, with narrow slabs approximately aligned with the summer solstice, near the beginning of the rainy season. More complex structures followed during a megalith period the researchers dated to between about 4500 BC to 3600 BC. Using their original measurements, complemented by satellite imagery and GPS measurements by Brophy and Rosen, they confirmed possible alignments with Sirius, Arcturus, Alpha Centauri, and the Belt of Orion. They suggest that there are three pieces of evidence suggesting astronomical observations by the herdsmen using the site, which may have functioned as a necropolis. "The repetitive orientation of megaliths, stele, human burials and cattle burials reveals a very early symbolic connection to the north." Secondly, there is the orientation of the cromlech mentioned above. The third piece of evidence is the fifth millennium alignments of stele to bright stars.