Coronal mass ejection

Coronal mass ejection

. A huge coronal mass ejection, abbreviated CME, is seen in this image. The white circle denotes the edge of the photosphere, so this mass ejection is about twice as large as the visible Sun. The black area corresponds to the occulting disk of the space-borne telescope, called a coronagraph, that blocks intense sunlight and permits the tenuous, million-degree corona to be seen. This coronagraph image, taken on 27 February 2000 with the Large Angle Spectrometric COronagraph (LASCO) on the SOlar and Heliospheric Observatory. (SOHO). (Courtesy of the SOHO LASCO consortium. SOHO is a project of international cooperation between ESA and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University