SOHO Composite: Coronal Mass Ejection . ... Credit Copyright: SOHO - LASCO - EIT Consortium, ESA , NASA Explanation: This complex composite image of an ominous and spectacular event - an expanding storm of energetic particles from the Sun - was constructed using data recorded by the SOHO spacecraft on November 6, 1997. ... Known as a Coronal Mass Ejection or CME, the expanding cloud has become relatively cool and dark in the middle with bright edges still connected to the solar surface. ...