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In this view of the Sun's northern pole, bright baubles of plasma
surround an inky black swath of darkness known as a coronal
hole. Coronal holes are enigmatic because they rotate rigidly, like a
frisbee, but the rest of the Sun's plasma rotates differentially, like
milk swirled in a mug of coffee.
This particular coronal hole contains a bright spike of plasma, which
may be a jet. Solar jets rapidly expel plasma at a temperature of
millions of degrees along open magnetic field lines that travel into
interplanetary space. ~ Courtesy of Monica Bobra (SAO)
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