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Solar prominences

Solar prominences

EIT 304Å image details many solar features and some elongated prominences — Prominences are huge clouds of relatively cool dense plasma suspended in the Sun’s hot, thin corona. Emission in this spectral line shows the upper chromosphere at a temperature of about 60,000 degrees K. Every feature in the image traces magnetic field structure. The hottest areas appear almost white, while the darker red areas indicate cooler temperatures. Taken December 5, 1998.
Courtesy of SOHO/EIT consortium. SOHO is a project of international cooperation between ESA and NASA.