Cometa perdendo a cauda

Synopsis: This phenomenon has been observed on several occasions, most notably on 20 April 2007, when the ion tail of Comet Encke was completely severed when the comet passed through a coronal mass ejection. This event was observed by STEREO probes.
Source: Wikimedia Commons - NASA.
URL: http://upload.wikimedia.org/wikipedia/commons/9/94/Encke_tail_rip_of.gif