Mighty Comet ISON: Space and Earth Telescopes to Track 'Comet of the Century'by Clara Moskowitz, Assistant Managing Editor | August 06, 2013 05:30pm ET504 69 24Share9 The Hubble Space Telescope captured this view of Comet ISON, C/2012 S1 (ISON), on May 8, 2013 as it streaked between the orbits of Jupiter and Mars at a speed of about 48,000 mph. Credit: NASA, ESA, and the Hubbl..