UK Daily Mail
April 12, 2011
Believe it or not, this is a relatively quiet day on the sun.
This amazing image shows a large sunspot group moving across our star’s surface.
Visible as the bright area near the horizon is AR 9169, a sunspot group from the last solar cycle.
Even the relatively cool dark regions have temperatures reaching thousands of degrees Celsius.
But the bright glowing gas flowing around the sunspots has a temperature of over one million degrees Celsius.
Watch a video showing cascades of spiralling magnetic loops on the sun’s surface as observed by Nasa’s Solar Dynamics Observatory last week:
This article was posted: Tuesday, April 12, 2011 at 5:38 am