Skip to comments.Astronomy Picture of the Day -- Sunspot Loops in Ultraviolet
Posted on 01/26/2014 9:00:23 AM PST by SunkenCiv
Explanation: It was a quiet day on the Sun. The above image shows, however, that even during off days the Sun's surface is a busy place. Shown in ultraviolet light, the relatively cool dark regions have temperatures of thousands of degrees Celsius. Large sunspot group AR 9169 from the last solar cycle is visible as the bright area near the horizon. The bright glowing gas flowing around the sunspots has a temperature of over one million degrees Celsius. The reason for the high temperatures is unknown but thought to be related to the rapidly changing magnetic field loops that channel solar plasma. Large sunspot group AR 9169 moved across the Sun during 2000 September and decayed in a few weeks.
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[Credit: TRACE Project, NASA]
“OVER one million degrees Celsius!”
That’s impossible for me to begin to IMAGINE.
Gosh, that’s a beautiful picture.
Beautiful image. Thanks for posting.
That’s a real Beauty!
I’ve found APoD recycles sometimes; APoD selections have been posted twice on a number of occasions, but years apart.
for a bad example:
That’s just a double posting on FR; I really have found some.
Okay, so, here’s the same pic, different scale, from the actual APoD site, from 2010 (the ones above are 2002):