Celebs React to Leonard Nimoy's Passing: Wil Wheaton, NASA and More Tweet Tributes

Hollywood is mourning the loss of Leonard Nimoy . The beloved actor, who was best known for his role as Spock in the hitStar Trek series, died today at the age of 83. His wife, Susan Bay Nimoy, confirmed his passing to the New York Times, citing the cause of his death as end-stage chronic obstructive pulmonary disease. Nimoy was reportedly hospitalized last week for chest pains, but was tweeting as recently as Monday, when he wrote: "A life is like a garden.

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