Did that little Earth-sized sphere zooming around the Sun have anything to do with it moving??? This series of images is from the STEREO Behind (195) satellite on 2010-01-19. There is a small sphere hovering above the Sun in the 12 o'clock position. You should easily be able to see it. When the Sun starts moving, note that the sphere is apparently orbiting the Sun over a period of about 3 hours. There are timestamps on each frame! Since the Sun is around 4,366,813 kilometers in circumference, we can calculate that this object was traveling at over 1,455,000 kph (over 904,470mph).