Extreme Ultraviolet Imaging Telescope (EIT) image of a huge handle-shaped prominence taken on Sept 14 1999 taken in the 304 angstrom wavelength. Prominences are huge clouds of relatively cool dense plasma suspended in the Sun's hot thin corona.
At times, they can erupt, escaping the Sun's atmosphere. 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.
Photo : NASA ESA SOHO EIT