This is the best tl;dr I could make, original reduced by 72%. (I'm a bot)

> A huge hole has appeared in the sun which is 20 times larger than Earth, it has been reported.

> It will result in 1.8-million-mile-per-hour solar winds being sent towards Earth on Friday.

> NASA said: "Coronal holes are magnetically open areas that are one source of high-speed solar wind. They appear dark when viewed in many wavelengths of extreme ultraviolet light, such as seen here. At times, the solar wind can generate aurora at higher latitudes on Earth."

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