Aurora: Curtains in the Sky . ... Explanation: Looking out over Lake Superior at dusk you see Venus (lower left) and ... curtains? Like an ant looking up at window curtains , aurora frequently appear as huge flowing light displays. ... Aurora are caused by electrons from the solar wind funneling to Earth along magnetic field lines , and striking atoms and molecules in our atmosphere. Auroral color is determined by which atmospheric ions are struck and recombine to form neutral atoms. ...