Dark shadow of the Moon

NASA SO­LAR DY­NAM­ICS OB­SER­VA­TORY, 7 NOVEM­BER 2018

Sky at Night Magazine - - EYE ON THE SKY -

The or­bit­ing So­lar Dy­nam­ics Ob­ser­va­tory man­aged to cap­ture this ul­tra­vi­o­let im­age of the Moon par­tially block­ing the Sun. NASA sci­en­tists can study the sharp edge of the lu­nar shadow to mea­sure how light dif­fracts around the tele­scope’s op­tics, and thereby fine-tune the in­stru­ments for sharper ob­ser­va­tions.

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