SPARK July 2015 | Page 16

IC CU RTA I G A M Spot The Plough! Why the Aurora show in our night sky keeps us coming back for more. Stunning multicoloured ripples across the sky called auroras have caught the imagination of people for many centuries. The Aurora Borealis (Northern Lights) can normally be seen near the far north of our planet in Canada, Iceland, Sweden, Norway and Finland. At the other side of the planet, the Aurora Australis (Southern Lights) forms an oval shape around Antarctica. Last year an aurora was even spotted in the United Kingdom! 16 SPARK Sometimes an aurora is barely visible. But at other times the auroras can be incredibly bright, multihued and fast moving. Tall green curtains of lights, red-tipped at their bottom, stretch across the horizon. Up to a thousand kilometres in length, they ripple, sway, fold and unfold, then mysteriously disappear, only to reform in a new shape minutes later.