A beautiful aurora
Here's a stunningly beautiful photograph that arrived in the latest email from Spaceweather.com -- below I've posted the relevant part concerned with the photo:
AURORA WATCH: A solar wind stream is buffeting Earth's magnetic field and causing auroras at high latitudes. Last night in Finland, Sauli Koski snapped this picture.
When the solar wind stream first hit Earth on Nov. 9th, the impact spread auroras as far south as Illinois in the United States. Since then, the display has retreated to Alaska, Canada and Scandinavia. Oh, to be in Finland!