Hein Hvatum, who in the 1970s and '80s supervised construction of one of the world's most powerful radio observatories, died of cancer May 22 at his home in Charlottesville, Va. He was 85. In 1974, Hvatum assumed responsibility for construction of the National Radio Astronomy Observatory's Very Large Array, an arrangement of radio telescopes in central New Mexico. Completed in 1982, the Very Large Array is used by astronomers 24 hours a day.

U. Utah Phillips, a Grammy-nominated folksinger, rabble-rouser and anarchist whose wild white beard recalled his years as a tramp, died of heart disease May 23 at his home in Nevada City, Calif. He was 73. Phillips, who over four decades on the road combined storytelling with song, described the plight of the working class, the power of labor unions and the necessity of direct action. He dubbed himself the "Golden Voice of the Great Southwest."

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