Monday, December 18, 2006

Ice Age Map of the Night Sky

A painted map of the prehistoric cosmos is on the wall of a famous Ice Age cave at Lascaux in central France.

Cro-magnon man — distant ancestors of humans living much later than the earlier Neanderthals and Aurignacians — painted the Lascaux caves with drawings of bulls, horses and antelope some 16,500 years ago. Thus, the map may be 16,500 years old.

The Ice Ages were cold periods in ancient history when glaciers descended across the northern continents and then receded. The temperatures experienced by humans and their ancestors alternated between cold and warm. Scientists say there have been at least four Ice Ages. Today, when people speak of "the Ice Age," they usually refer to the most recent glacial period, which ended about 8,000 years ago.

Summer Triangle. The painted walls of the Lascaux caves were discovered in 1940. The sky map was identified year later in a region of the Lascaux caves known as the Shaft of the Dead Man. Painted on to the wall of the shaft is a bull, a strange bird-man and a mysterious bird on a stick.

Since it was in the time we call pre-history — before people started recording history — no one knows if a cave could have been used as a kind of planetarium where stars were charted.

European researcher Michael Rappenglueck, however, suggests that it is a map of three particular stars — Vega, Deneb, Altair — that astronomers today refer to the Summer Triangle. Those stars are among the brightest objects in the sky during the middle of a northern summer. Rappenglueck sees the eyes of the bull, bird-man and bird as representing Vega, Deneb and Altair.

Source: Space Today Online

No comments: