Rocket Flight to Sharpen NASA’s Study of the Sun

  It’s best not to look directly at the Sun, unless you’re one of NASA’s Sun-observing instruments. And even then, doing so will cause some damage. Exposure to the Sun degrades light sensors of all kinds, from the retinas in the human eye to instruments aboard NASA’s Solar Dynamics Observatory satellite, or SDO. Fortunately, with periodic calibrations, the latter can continue transmitting…

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