Sci-fi movie planets for 'Avatar' fans to visit if 'Fire and Ash's return to Pandora has them longing for more vibrant worlds ...
Artist’s impression of the old white dwarfs WDJ2147-4035 and WDJ1922+0233 surrounded by orbiting planetary debris, which will accrete onto the stars and pollute their atmospheres. WDJ2147-4035 is ...
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