In this picture, the spiral structure on the left is mysterious. One possability as to what it might be would be a binary star that is about to enter planetary nebula phase and is ejecting its outermost atmoshphere.I learned that a binary star is characterised by two stars orbiting around a common center of focus. This spiral is 1/3 of a lightyear across. it takes the amount of time for the starts to orbit eachother as it takes another layer of the spiral to form, approximately 800 years.
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