The Active Sun from SDO 

The Solar Dynamics Observatory (SDO) observes the sun with many different instruments, in many different wavelengths of light. Many of these capabilities are not possible for ground-based observatories—hence the need for a space-based observing platform. This movie is generated for a wavelength of 304 Ångström (30.4 nanometers), which highlights a spectral line emitted by helium atoms that have lost 1 electron at temperatures of 50,000 K. Solar prominences are readily visible at this wavelength. 
This visualization is one of a set of visualizations (others available at the link provided below) covering the same time span of 17 hours over the full wavelength range of the mission. Such visualizations are useful for illustrating how different solar phenomena, such as sunspots and active regions, look very different in different wavelengths of light. These differences enable scientists to study them more completely, with an eventual goal of improving space weather forecasting. 


For more information visit: 
svs.gsfc.nasa.gov/3983 

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