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Science

usonian

(19,142 posts)

6. They're still hot as hell.

Reply to WhiteTara (Original post)

Fri Dec 8, 2023, 02:04 PM

Dec 2023

No finger-poking allowed.

They only LOOK dark by contrast with the rest of the sun.

Coronal holes are only visible in ultraviolet wavelengths, appearing as dark patches of relatively cool particles in our observations. They're less likely to actually fling solar wind outwards as they're simply an opening, allowing for these photons and electrons to escape.

https://www.sciencealert.com/gaping-hole-in-the-sun-bigger-than-60-earths-just-blasted-solar-wind-right-at-us