In recent years, thanks to data gathered by a series of
successful satellites carrying a host of instruments to observe the Sun, many important advances have been made in understanding solar coronal activity. These
data, examined with the aid of numerical computer modeling and alongside theoretical studies of solar phenomena, changed our view of the active Sun. Most of the satellites are still operational, and they continuously produce new images leading to new scientific
results. Several new space missions to study the Sun are planned over the next decade by NASA, the European Space Agency (ESA), and Japan. One of these missions is the NASA Solar-Terrestrial Relations Observatory (STEREO), scheduled to be launched in 2004. STEREO will consist of two spacecraft that will observe the Sun at two separate vantage points in
solar orbit and build a three-dimensional image of coronal mass ejections and solar disturbances.
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Publish Date: 01 October 2000
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