The X-ray Sun

The image you see here was taken through a filter which transmits only low energy X-rays. Low energy X-rays are often referred to as soft X-rays.

X-rays from the Sun are produced by hot gas of more than one million degrees. This gas exists in the highest layer of the Sun called the corona.

This picture of the Sun comes from the Soft X-Ray Telescope on the Yohkoh spacecraft, orbiting high above the Earth.