"Aurora waves goodbye and lets the stars take center stage. Good night from ISS," wrote Jeff Williams aboard the International Space Station. Aurora yields to the stars in this time-lapse video. Auroras are a space weather phenomenon that occur when electrically-charged electrons and protons collide with neutral atoms in the upper atmosphere. The dancing lights of the aurora provide a spectacular show for those on the ground, but also capture the imaginations of scientists who study the aurora and the complex processes that create them. Credit: NASA #nasa #space #iss #spacestation #aurora #spaceweather #science