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A look back on the years's launches, space explorations and discoveries.
30 of 31
This image taken recently by the Solar Dynamics Observatory's Atmospheric Imaging Assembly (AIA) instrument at 171 Angstrom shows the current conditions of the quiet corona and upper transition region of the Sun.The Solar Dynamic Observatory was launched on February 11, 2010 with the mission to observe the sun for five years. UPI/ NASA
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