Comet Lovejoy passes by. It’s a Kreutz sungrazer (a sun-grazer), and at perihelion it reaches a speed of 536 km/s (0.18% the speed of light!), coming within just 140,000 km of the Sun’s surface (less than half the Earth-Moon distance!) Post navigation Previous Article Previous Article January 1, 2015 Next Article Next Article 2015
