1. Subscribersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
    28 Dec '04
    Moves
    52619
    09 Feb '12 13:39
    http://apod.nasa.gov/apod/ap120209.html

    I was looking at this time lapse movie of a northern aurora and was wondering what causes the movement seen. Is it the Earths' magnetic field moving that much or the incoming ions moving around that causes the changes we see in this video?