Hubble Offers a Dazzling ‘Necklace’ - Science@NASA
https://science.nasa.gov/missions/hubble/hubble-offers-a-dazzling-necklace
WEBAug 10, 2011 · This NASA Hubble Space Telescope image is of the Necklace Nebula, located 15,000 light-years away in the constellation Sagitta (the Arrow). In this composite image, taken on July 2, 2011, Hubble's Wide Field Camera 3 captured the glow of hydrogen (blue), oxygen (green), and nitrogen (red).
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