Photo of the Day: Swirls of green and red appear in an aurora over Whitehorse, Yukon. The aurora was due to the interaction of a coronal mass ejection (CME) from the sun with Earth’s magnetosphere. (Photo: NASA)

Photo of the Day: Swirls of green and red appear in an aurora over Whitehorse, Yukon. The aurora was due to the interaction of a coronal mass ejection (CME) from the sun with Earth’s magnetosphere. (Photo: NASA)