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Colour image of Gum Nebula (Gum 12), a vast emission nebula spanning 36° in the night sky, 1,000 light-years across, 1,500 light-years distant, believed to be a million-year-old expanding supernova remnant. Contains Gum 16 (the Vela Supernova Remnant). Collections: Southern Celestial Hemisphere - Supernovae
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Wide-field monochrome astrophotography revealing the massive, faint outer shell of the Gum Nebula spanning across the background stars.