While orbiting 216 nautical miles (400 km) above earth, astronauts and cosmonauts had this view of aurora borealis above Canada. Auroras are a weather phenomenon caused by electrically-charged electrons and protons colliding with neutral atoms in the upper atmosphere. From space, the aurora show appears to blanket Earth with dancing lights. P.S. Spacewalk tomorrow! Head to NASA.gov for more info. ✨ Credit: NASA #nasa #auroras #northernlights #fromspace #greenearth #spacestation #iss #prettyplanet #lowearthorbit