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Coronal Mass Ejection
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Coronal Mass Ejection

March 31, 2003
A LASCO C2 "running difference" image showing a "halo" CME blast beginning its journey towards Earth. With the LASCO C2 instrument providing a perspective of about six solar, the Sun is seen hurtling particles into space during a CME on 7 April 1997. The image compares one image to the preceding one and highlights the areas of change between the two. This gives a clearer representation of the dynamics of this "halo event," so called because the circular area of the edges of the blast seem to form a kind of halo around the Sun.