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.

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<p><a href="http://www.physorg.com/news92665812.html">XMM-Newton finds the leader of the Magnificent Seven in a spin</a></p> <p>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.</p>