NEWS Space and Space Weather
SMILE's Ultraviolet Camera Captures the Full Auroral Oval for the First Time Since 2008
NASA's October 6 Astronomy Picture of the Day features SMILE's ultraviolet video of the full northern auroral oval, first released by ESA on September 30. Here is what the footage shows, what a magnetospheric substorm actually is, and why continuous whole-oval watching matters for power grids, polar flights, GPS and aurora watchers.