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Spectacular Picture Of Moon and Sun
This picture was taken by NASA's SDO (Solar Dynamics Observatory) in a wavelength of extreme ultraviolet light, the dark Moon created a partial eclipse of the Sun. This event took place on October 7, 2010. The bottom picture shows a solar flare on the left side of the sun.
These images, while unusual and cool to see, have practical value to the SDO science team. Karel Schrijver of Lockheed-Martin's Solar and Astrophysics Lab explains: "The very sharp edge of the lunar limb allows us to measure the in-orbit characteristics of the telescope e.g., light diffraction on optics and filter support grids. Once these are characterized, we can use that information to correct our data for instrumental effects and sharpen up the images to even more detail."
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