NASA's Jet Propulsion Laboratory has resolved a 16-year-old cosmic mystery and found the missing links to the Blue Ring Nebula. The Blue Ring Nebula spotted by the Galaxy Evolution Explorer (GALEX) perplexed scientists for several years.

NASA resolves the mystery of Blue Ring Nebula, reveal stellar missing link

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blue ring-nebula

NASA resolves the mystery of Blue Ring Nebula, reveal stellar missing link