Boeing Frontiers
August 2002 
Volume 01, Issue 04 
Top Stories Inside Quick Takes Site Tools
a huge, curling solar prominenceMOLTEN MAYHEM The Solar and Heliospheric Observatory Spacecraft (SOHO) captured this image of a huge, curling solar prominence as it erupted from the sun on July 1, 2002. Prominences are huge clouds of relatively cool, dense plasma suspended in the sun's hot corona. Magnetic fields built up enormous forces that propelled particles out beyond the sun's surface. Emission in this spectral line shows the upper chromosphere at a temperature of about 60,000 degrees Kelvin (107,540 degrees Fahrenheit). NASA said the prominence appears to extend a distance of at least 30 times the diameter of Earth but would not head toward the planet. SOHO is a joint NASA/European Space Agency venture that observes the sun 24 hours a day.
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