Space.com #Death Dive! Comet Plunges into the Sun at Mind-Blowing Speed 4 August 2016 fborgosano Leave a comment Share: A comet with a death wish appears to have met a truly fiery end today (Aug. 4) after diving into the sun at a truly jaw-dropping speed 373 miles per second (a whopping 1.34 million mph) to become one of the brightest sungrazing comets ever. from Space.com ift.tt/2ay0Y5Z Share: