Photo #1 (January 2008)
AN X CLASS FLARE REGION ON THE SUN
May the long time sun shine upon you
All love surround you
and the pure light
within you
guide your way on
- Classic song recorded by many artists:
Incredible String Band, Snatam Kaur, and Singh Kauar
Credit: TRACE Project, NASA
In the darkness of the winter season we are still warmed by the sun - from much greater cold that would reign were it not for her rays. Yet we are at the same time threatened by global heating, in the season of geological time that may be pushed by our irresponsible pollution into a very very long, hot summer... In which we may not survive... Nor most of the life forms currently on our planet...
- DB
Why does the Sun flare? Unpredictably, our Sun unleashes tremendous flares expelling hot gas into the Solar System that can affect satellites, astronauts, and power grids on Earth. This close up of an active region on the Sun that produced a powerful X-class flare was captured by the orbiting TRACE satellite. Clicking on the image should bring up a movie that shows the evolution of Active Region 9906 over about four hours. The glowing gas flowing around the relatively stable magnetic field loops above the Sun's photosphere has a temperature of over ten million degrees Celsius. These flows occurred after violently unstable magnetic reconnection events above the Sun produced the flare. Many things about solar active regions are not well understood including the presence of dark regions that appear to move inward during the movie.
