Coronal loop
Videos
In solar physics, a coronal loop is an ill-defined arch-like structure in the Sun's atmosphere made up of relatively dense plasma confined and isolated from the surrounding medium by magnetic flux tub
Typical coronal loops observed by TRACE
Full-disk mosaic of the million-degree corona by TRACE
Coronal mass ejection
Videos
A coronal mass ejection is a significant ejection of plasma mass from the Sun's corona into the heliosphere. CMEs are often associated with solar flares and other forms of solar activity, but a broadl
When observed in white-light coronagraph imagery, CMEs sometimes resemble a light bulb, possessing a bright bulb-like outer shell surrounding a dark void and compact inner structure.
Photo from the International Space Station (ISS) of aurora australis during a geomagnetic storm on 29 May 2010. The storm was most likely caused by a CME that had erupted from the Sun on 24 May 2010, five days prior to the storm.