# #Mon Aug 09 11:41:57 CEST 2010 Slide__UGKvYKOaEd-WfYQ0GneCwQ_subTitle=Sources for the gravitational waves reaching us here on Earth are all cosmic events in which masses are accelerated. One example are supernovae\: When stars with more than ten solar masses have exhausted their nuclear fuel, a gigantic explosion ensues called a supernova. Depending on the details of the explosion, the associated movement of matter can lead to a distinct gravitational wave pulse. The image shows the Crab nebula, remnant of a supernova explosion that was observed by chinese astronomers in the year 1054. Slide__UGKvYKOaEd-WfYQ0GneCwQ_footer=Image\: European Southern Observatory Slide__UGKvYKOaEd-WfYQ0GneCwQ_title=Sources of gravitational waves