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08. Aug 2020

June 19, 2011
by Guest Post
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A Green Ring Fit for a Superhero

This glowing emerald nebula seen by NASA’s Spitzer Space Telescope is reminiscent of the glowing ring wielded by the superhero Green Lantern. In the comic books, the diminutive Guardians of the Planet “Oa” forged his power ring, but astronomers believe … Continue reading