X-ray observations of the corona reveal lighter and darker spots, the latter indicating where the corona is cooler. These darker spots are the source of

Question

Quizplus · Accepted Answer

The darker spots in the corona, known as coronal holes, are regions where the Sun's magnetic field lines open out into space, allowing high-speed solar wind to escape, resulting in high-speed jets of gas flowing out of the Sun.

X-Ray Observations of the Corona Reveal Lighter and Darker Spots