Rosetta spacecraft bound for comet tomb

Europe's Rosetta spacecraft was heading Friday for a mission-ending crash into the comet it has stalked for two years, a dramatic conclusion to a 12-year odyssey to demystify our Solar System's origins. Sent by ground controllers on a leisurely, 14-hour freefall, the space pioneer was engaged in a last-gasp spurt of science-gathering on the 19-kilometre (12-mile) journey to its icy comet tomb. The moment of impact will be 1038 GMT, give or take two minutes, the European Space Agency said after o