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Just before winter sets in the outer arms of the Milky Way pass overhead. Embedded in them are regions of star formation and star death. M76 is a Planetary Nebula where the central star has shed its outer atmosphere shedding its hydrogen (the bright red areas) and oxygen (blue areas) into a shell, which is expanding into the surrounding space.
https://www.astromart.com/common/ima...7.jpg&caption= |
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