Polar Plumes. Close-up, extreme-ultraviolet view of the south polar
coronal hole (large dark region) obtained with the SOHO EIT
instrument on 8 May 1996. The fast component of the solar wind emanates
from these coronal holes. Plumes can be seen emerging from the tiny bright
spots, but they are not the main source of the high speed winds. These images
were taken in the extreme-ultraviolet light of highly ionised iron formed
at a temperature of 1.5 million degrees kelvin (top) and 1.0 million
degrees kelvin (bottom)
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