Cluster spacecraft makes a shocking discovery

ESA's Cluster was in the right place and time to make a shocking discovery. The four spacecraft encountered a shock wave that kept breaking and reforming – predicted only in theory.

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<p><a href="http://www.physorg.com/news98367923.html">Cluster spacecraft makes a shocking discovery</a></p> <p>ESA's Cluster was in the right place and time to make a shocking discovery. The four spacecraft encountered a shock wave that kept breaking and reforming – predicted only in theory.</p>