Astronomical Advances in Prehistory

Altamira, Spain, 16,000 BC
Origin of the hexagram diagramming sunrises and sets of equinoxes and solstices.
Translation by Duncan-Enzmann - See:  An Ancient Star

For your reference: Timeline developed by R D Enzmann and J R Snyder listing the progress made in astronomical observations and methods in prehistory. 

Important dates, sites, and astronomical discoveries in prehistory (Duncan-Enzmann)

      BC          Site                                  Discovery

450,000 Bilzingsleben            shadows and sundials

77,000 Blombos, S. Africa    solar V

38,000 Vogelherd                    solar & lunar calendars 

29,000 Chauvet                        tetra fauna calendrics

18,000 Altamira                       overlapped solar V

14,500 Lascaux                        precession recognized

12,500 Gönnersdorf               solar azimuth

11,000 Göbekli Tepi              siting holes and slots

8500 Early Stonehenge      observatory

7500 Goseck, Carnac          find level with water, find vertical with plumb 

6500 Europe                          Venus clock, 7 planets,  Named days of the week

Camp Century, Greenland

Dates (BC) according to the Camp Century Ice Core (Duncan-Enzmann)

45,000           Hengelo Denecamp

29,000           Aurignacian

21,000           Solutrean

14,500           Lascaux

12,500           Bølling

9000              Allerød

8000              Pre Boreal

6000              Boreal  

5900 – 3750 Atlantic Grand Climate Optimum 

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Translations of ice age inscriptions by Dr. Robert Duncan-Enzmann, compiled, edited, and published by J. Robert Snyder, White Knight Studio. An extraordinary look into our prehistoric past, provided by more than 1,000 extant ice age inscriptions from Gönnersdorf, Germany, ca. 12,500 BC, now translated to reveal their exquisite stories and hidden history.