Looking up at the stars has filled us with awe and mystery for as long as human beings have walked the earth. But one celestial event is special: the Aurora Borealis, or Northern Lights, where vast curtains of colour sway in the Milky Way, shifting from light green to bright blue and red, like waves dancing on the sky. In Norse mythology they were believed to be the Valkyries leading fallen soldiers to Valhalla; the Cree Indians saw their ancestors; the Chinese, fire-breathing dragons. Today we know they are caused by particles from the sun interacting with gases from the earth’s atmosphere, but the science is upstaged by the effect. Somehow, we see ourselves reflected in their light, all that we feel but can’t articulate or understand, a sense of transcendence, and hope, the unfathomable mysteries of the cosmos of which we are part.