Polarlichter über Nordeuropa

dapdThe aurora borealis, or Northern Lights, are seen near the city of Tromsoe, northern Norway, late Tuesday, Jan. 24, 2012. Stargazers were out in force in northern Europe on Tuesday, hoping to be awed by a spectacular showing of northern lights after t

dapdThe aurora borealis, or Northern Lights, are seen near the city of Trondheim, Norway Tuesday Jan. 23, 2012. Stargazers were out in force in northern Europe on Tuesday, hoping to be awed by a spectacular showing of northern lights after the most powerf

dapdThe aurora borealis, or Northern Lights, are seen near the city of Trondheim, Norway Tuesday Jan. 23, 2012. Stargazers were out in force in northern Europe on Tuesday, hoping to be awed by a spectacular showing of northern lights after the most powerf

dapdIn this photo provided by Brian Emfinger, aurora borealis lights up the Ozark, Ark. sky on Monday, Oct. 24, 2011. Emfinger, a storm chaser, said this is only the second northern lights in a decade that he has seen this far south. (Foto:realclearwx.com

dapdThe aurora borealis, or Northern Lights, are seen near the city of Tromsoe, northern Norway, late Tuesday, Jan. 24, 2012. Stargazers were out in force in northern Europe on Tuesday, hoping to be awed by a spectacular showing of northern lights after t

dapdIn this March 10, 2011 photo, the aurora borealis, or northern lights, fill the sky north of Duluth, Minn. (Foto:Duluth News Tribune, Andrew Krueger/AP/dapd)