2017-4-8 · 2017 April 8. Zeta Oph: Runaway Star. NASA, JPL-Caltech, Spitzer Space Telescope. Explanation: Like a ship plowing through cosmic seas, runaway star Zeta Ophiuchi produces the arcing interstellar bow wave or bow shock seen in this stunning infrared portrait . In the false-color view, bluish Zeta Oph, a star about 20 times more massive than the ...