"Not to worry! As many of you may know, a gigantic hole in the Sun’s atmosphere is not terribly unusual. But you have to admit: This one is pretty dramatic. The image above is actually a composite of three acquired by the Solar Dynamics Observatory spacecraft this past week. Each color highlights a different part of the Sun’s extended outer atmosphere — the corona. The coronal hole is that big, dark-blue splotch at the bottom." - Todd Hoff