Close-up View of an Active Region of the Sun, March 23, 2007

NASA Solar TErrestrial RElations Observatory STEREO satellites have provided the first three-dimensional images of the Sun. The structure of the corona shows well in this image.

NASA Solar TErrestrial RElations Observatory STEREO satellites have provided the first three-dimensional images of the Sun. The structure of the corona shows well in this image.

SunSolar TErrestrial RElations Observatory STEREO