False-color X-ray image of the Sun, taken by the Yohkoh solar observatory. The image shows the sun's corona in brilliant red, highlighting active regions of millions of degrees Celsius, contrasting with the darker photosphere. Captured shortly before the Winter Solstice in the Northern Hemisphere.

Astronomy Picture from 21/12/1998

Solstice Sun In Soft X-rays

Source: https://apod.nasa.gov/apod/ap981221.html


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