Comet ISON pronounced dead: Sun is chief suspect (Update)
Comet ISON, once optimistically called the comet of the century, is dead, the victim of a way-too-close brush with the sun. It was barely a year old.
Video: The Sun reverses its magnetic poles
This visualization shows the position of the sun's magnetic fields from January 1997 to December 2013. The field lines swarm with activity: The magenta lines show where the sun's overall field is negative ...