Astrophysics (Index)About

coronal hole

(cool, low-density portions of the Sun's corona)

A coronal hole is a portion of the Sun's corona plasma that is cooler, darker, and has a lower density. The corona is never uniform, always with such coronal holes, that change over time. The holes emit higher velocity solar wind and are contributors to solar weather.


(Sun,stars,corona)
Further reading:
http://en.wikipedia.org/wiki/Coronal_hole
https://www.swpc.noaa.gov/phenomena/coronal-mass-ejections

Referenced by pages:
Sun surface features

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