ESA News http://www.esa.int 9 March 2007 XMM-Newton finds the leader of the Magnificent Seven in a spin A decade-long mystery has been solved using data from ESA's X-ray observatory XMM-Newton. The brightest member of the so-called 'magnificent seven' has been found to pulsate with a period of seven seconds. The discovery casts some doubt on the recent interpretation that this object