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PMR 1 nebula, space telescope image
PMR 1 nebula. Space telescope image of the PMR 1, or Exposed Cranium, planetary nebula that lies around 5000 light-years away in the Vela constellation. It is a host to a hot massive dying star that is rapidly disintegrating and losing its mass. The nebula's insides, which appear mushy and red in this view, are made up primarily of ionised gas, while the outer green shell is cooler, consisting of glowing hydrogen molecules. Imaged by NASA's Spitzer Space Telescope.
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