EarÂliÂer this week, NASA astroÂnaut ClayÂton AnderÂson tweetÂed a 14 secÂond time-lapse film of the AuroÂra BoreÂalis takÂen from the InterÂnaÂtionÂal Space StaÂtion. The short clip called to mind a more extenÂsive view of the NorthÂern Lights shot by Don PetÂtit, also workÂing in the ISS, back in 2008. (Watch above.) And it raised the basic quesÂtion: What causÂes the AuroÂra BoreÂalis anyÂway?
The beauÂtiÂful natÂurÂal pheÂnomÂeÂnon starts deep inside the core of the sun, and the rest of the stoÂry gets explained in a five minute aniÂmatÂed video creÂatÂed by NorÂweÂgian filmÂmakÂer Per Byhring and the Physics DepartÂment at the UniÂverÂsiÂty of Oslo.
Both clips now appear in our colÂlecÂtion of 125 Great SciÂence Videos.
via Coudal PartÂners BlendÂed Feed and BrainÂPickÂings