posted on Jul, 21 2010 @ 10:56 PM
ULTRAVIOLET SUNSPOT: Sunspot 1089 is churning out a lot of extreme ultraviolet (EUV) photons. Witness this EUV image taken just hours ago by the Solar
The bright glow comes from hot (80,000 K) plasma trapped by the sunspot's magnetic field. All by itself, this one 'hot spot' is lifting the EUV
brightness of the entire sun toward a high point for the year. EUV photons from sunspot 1089 are absorbed in Earth's upper atmosphere where they heat
the rarefied air and help reverse the recent collapse of the thermosphere.
Sunspot 1089 is still growing, both in brightness and area. Readers with solar telescopes are encouraged to monitor developments.