In images taken by X-ray telescopes, such as the one Hinode uses, coronal holes appear dark because the hot glowing gas which would otherwise fill them has spilled out in the solar wind.

• 上面的图像是由X射线望远镜拍摄到的，如日出（？），冕洞之所以表现为黑暗，是因为炙热的发光气体将填补这些已蔓延的太阳风。