Casual Friday — 5 years of SDO

February 11, 2015 was the fifth anniversary of the launch of NASA’s Solar Dynamics Observatory (SDO) spacecraft.  SDO captures images of the whole sun 24 hours a day, taking more than one image per second.  In the process, it’s given us an unprecedentedly clear picture of how massive explosions on the sun grow and erupt.  The imagery isn’t just scientifically useful — it’s also captivating, as the constant ballet of solar material through the sun’s atmosphere (the corona) carries on.


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