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Rare Hypergiant
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Rare Hypergiant

March 19, 2014
HR 5171, the brightest star just below the center of this wide-field image, is a yellow hypergiant, a very rare type of stars with only a dozen known in our galaxy. Its size is over 1300 times that of the Sun — one of the ten largest stars found so far. Observations with ESO’s Very Large Telescope Interferometer have shown that it is actually a double star, with the companion in contact with the main star.

Credit: ESO/Digitized Sky Survey 2

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