Comet PanSTARRS Streaks Across the Sky
In March 2013, the Comet PanSTARRS became visible to the naked eye in the night sky in the Northern Hemisphere. In space, NASA’s STEREO (Solar TErrestrial RElations Observatory) captured an even better view.
This movie, captured by the STEREO-B spacecraft, shows the comet and its fluttering tail as it moves through space. The stationary planet on the right is Earth, and the moving planet on the left is Mercury.
Video from NASA