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What does SD stand for?

SD stands for Solar Dynamics

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We have 158 other meanings of SD in our Acronym Attic

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Planned activities include observing the sun through solar telescopes and comparing what they see to images taken by various NASA's heliophysics' missions such as the Solar Dynamics Observatory, Solar Terrestrial Observatory (STEREO) and Solar and Heliospheric Observatory (SOHO), and perform real-time experiments with the sun's ultraviolet light.
Washington, Mar 12 ( ANI ): NASA's Solar Dynamics Observatory (SDO) entered its semi-annual eclipse season on March 2, 2013 - a period of three weeks when Earth blocks its view of the sun for a period of time each day.
In an article published in this month's Science, the agency said its Solar Dynamics Observatory recorded Comet C/2011 N3 nearing the sun and burning to nothing over a 20-minute span in July.