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Hypergiant Star Amazes for 30 Years

Artist's rendition of the hypergiant HR 8752 traversing the 'Yellow Evolutionary Void'. The graph plots the temperature at the surface of the star observed over a century. It rose from 5000 to 8000 degrees between 1985 and 2005, while the radius of the hypergiant decreased from 750 to 400 times the radius of the Sun (Image © A. Lobel, Royal Observatory of Belgium).

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