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The appearance of the aurora borealis has entranced and intrigued people from cultures across the world, inspiring art, music and stories, including tonight's Proms world premiere of Iain Bell's Aurora. But what creates it? Why is it green? Physicists Melanie Windridge, author of Aurora: In Search of the Northern Lights, and Nathan Case of Aurorawatch UK discuss the science that lies behind the Northern Lights. 麻豆官网首页入口 Radio 3 New Generation Thinker Eleanor Rosamund Barraclough is the author of Beyond the Northlands: Viking Voyages and the Old Norse Sagas.

Edited version broadcast on 麻豆官网首页入口 Radio 3 during tonight's interval.

Booking is not required for this event. Entry is on a first-come-first-served basis. Doors open from 30 minutes before the event begins - latecomers will not be admitted. Capacity is limited: please collect a raffle ticket from the steward at the main entrance on Beit Quad to secure your place.

Image: Melanie Windridge