Image Credit & Copyright: Jürg Alean
Wednesday, January 8, 2014
Astronomy Picture of the Day: January 8th of 2014
2014 January 8
Sunspot at Sunset
Image Credit & Copyright: Jürg Alean
Explanation: Sunsets may be the most watched celestial event, but lately sunsets have even offered something extra. A sunspot so large it was visible to the naked eye is captured in Swiss skies in this sunset scene from January 5, crossing left to right near the center of a solar disk dimmed and distorted by Earth's dense atmosphere. Detailed views reveal a large solar active region composed of sunspots, some larger than planet Earth itself. Cataloged as active region AR 1944, on January 7 it produced a substantial solar flare and a coronal mass ejection (CME) forecast to reach Earth. The CME could trigger geomagnetic storms and aurora on January 9.
Image Credit & Copyright: Jürg Alean
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