... Runaway stars are massive stars traveling rapidly through interstellar space. Like a ship plowing through cosmic seas, runaway star Alpha Cam has produced this graceful arcing bow wave or bow shock - moving at over 60 kilometers per second and compressing the interstellar material in its path. Hydrogen in M33 . ... A Bucket Wheel Excavator on Earth . ... A Leonid Meteor Over Sweden . ... The Car, the Hole, and the Peekskill Meteorite . ... Leonids and Leica . ... A Fog Bow Over California . ...