Comet and CME on the Sun . ... Credit Copyright: SOHO , SDO , NASA , ESA Explanation: Did a sun-diving comet just cause a solar explosion? ... This past weekend a comet dove toward the Sun and was followed very quickly by a Coronal Mass Ejection (CMEs) from the other side of the Sun. ... Another basis for this judgment is that CMEs are caused by rapid changes in the Sun's magnetic field, changes that a small comet seem unlikely to make. ... NASA Web Site Statements, Warnings, and Disclaimers . ...