Astronomy Picture of the Day . Sunspot at Sunset . ... Credit Copyright: Jo Hunter Explanation: Reddened rays of the setting Sun flooded the skies over Cedar Creek Lake, southeast of Dallas, Texas, planet Earth on July 6th. ... Telescopic views revealed the spot to be a complex of large solar active regions composed of sunspots, some larger than planet Earth itself. ... Publications with keywords: sunspot - active region - sunset . Publications with words: sunspot - active region - sunset . ...