GREEN COCKPIT: Earth is entering a solar wind stream that could spark high-latitude auroras during the next 24-48 hours. The first stirrings of Northern Lights were sghted this morning over Wisconsin and from the cockpit of an air ambulance flight over Canada. Aurora alerts: text, phone.

ARCTIC MIX: Something magical is happening around the Arctic Circle this week. The blue midnight skies of spring are intermingling with the gray snow clouds of winter--with a dash of green cutting through the mix. Anne Birgitte Fyhn photographed the phenomenon last night from Ringvassøya island, north of Tromsø, Norway:

Fyhn was on an overnight kayaking trip with friends. "This is how the sky looked just before the weather turned cloudy and a snow storm started," she says.