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SDO’s View of the Solar Eclipse

27 Aug 2017, 00:55 UTC
SDO’s View of the Solar Eclipse
(200 words excerpt, click title or image to see full post)

NASA dixit:
“While many in the U.S. experienced a total solar eclipse on August 21, 2017, SDO’s perspective, observing the Sun from Earth orbit, afforded it a view of a partial eclipse. This movie, created from images taken by NASA’s Solar Dynamics Observatory, shows the Sun first in visible light, and then in 171-angstrom extreme ultraviolet light. The apparent slight movement of the Sun is because SDO has a hard time keeping the Sun centered in its images during eclipses, with so much light being blocked by the Moon. The fine guidance systems on SDO’s instruments need to see the whole Sun in order keep the images centered from one exposure to the next. Once the transit was over, the fine guidance systems started back up, once again providing steady images of the Sun.”
Video credit: NASA

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