Others have tried to find astronomical significance to it.

Although archeologists are not certain about the purpose of each medicine wheel, it is believed that they had ceremonial and astronomical significance.

I knew from my photo album that I had seen precisely the same structure in 1959, without understanding the astronomical significance.

This legend could be a folk memory recalling the astronomical significance of the stones.

The most popular theories assign them religious or astronomical significance.

Some people think they're connected with religious ceremonies, others that they have some kind of astronomical significance.

There is evidence that some of the petroglyphs may be of astronomical significance.

A notable feature is the cup-marked stones in the circles which seem to suggest an astronomical significance.

Recent studies show many of these sites are interrelated and some have major astronomical significance.

Although archeologists are not definite on the purpose of each medicine wheel, it is thought that they probably had ceremonial or astronomical significance.