Bath Royal Literary & Scientific Institution (@brlsi.bsky.social)

☀️🪨Why is summer solstice celebrated at Stonehenge? Join Professor Clive Ruggles, Emeritus Professor of #Archaeoastronomy, as he explores the relationship of Stonehenge to the sun and moon🌙 🔗 www.brlsi.org/whatso...#Archaeoastronomy, #archaeology #astronomy #stonehenge #brlsi #bath #talks #science

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Sighting the sun – and moon? – at Stonehenge – Bath Royal Literary and Scientific Institution The connection between Stonehenge and summer solstice sunrise is well known, but over-speculation, by both astronomers and archaeologists, concerning its use for observations of the sky have led many to steer well clear of the subject. This talk will describe what we can sensibly say about the relationship of Stonehenge to the sun, how this relates to more conventional archaeological evidence that has been uncovered in recent years, and what it might have meant to the people who built and used Stonehenge. But what about the moon? We have just passed a major lunar standstill, which occurs every 18.6 years when the moon can be seen at fortnightly intervals exceptionally far to the north and south. Was this - as some say - known to our prehistoric forebears and was it marked and celebrated, at Stonehenge and elsewhere? Professor Clive Ruggles will present the challenges in exploring these questions and what we can reasonably conclude about the cultural significance of the sun and moon to those who built and used Stonehenge. As Emeritus Professor of Archaeoastronomy at the University of Leicester, Clive Ruggles has spent a lifetime investigating ancient people’s knowledge of the sky and the uses they make of what they perceive there. A lot of this involves studying the astronomical orientation of prehistoric monuments in Britain, Ireland and Europe — Stonehenge being a prime example. But Clive has also worked extensively on Hawaiian and Pacific star knowledge and in Peru, where in 2005 he co-discovered the 2200-year-old monumental solar observatory at Chankillo, which became a UNESCO World Heritage Site in 2021. In 2017 he was awarded the Royal Astronomical Society’s Agnes Mary Clerke Medal for a “lifetime of distinguished work in the overlapping areas of archaeology, astronomy and the history of science". https://www.brlsi.org/whatson/sighting-the-sun-and-moon-at-stonehenge/