The function of Stonehenge has long been a matter of conjecture. It could have been used to predict the summer and winter solstices, the vernal and autumnal equinoxes, and eclipses of the Sun and Moon. It may also have functioned as a means of predicting the positions of the Sun and Moon relative to the Earth, and thereby the seasons, and perhaps also as a calendar. As such it might have been the gathering place for religious ceremonies connected with the Sun and Moon. At Stonehenge as at other Bronze Age sites, the emphasis on the circle may also reflect the circular nature of birth and death, and the passage of the seasons.