UCCLE, Belgium, Dec. 11 (UPI) -- European researchers say a 30-year study of an extraordinary cosmic "hypergiant" has revealed clues to the evolution of the universe's most massive stars.
Researchers from six European countries, including Belgian astronomers, have observed the hypergiant star HR 8752 for 30 years while it traversed a "Yellow Evolutionary Void," an extremely rare stage of development that saw the star's temperature increase by more than 5,000 degrees Fahrenheit.