It received some good and some bad reviews when it was released. Now "2001: A Space Odyssey" is recognized by critics as one of the greatest movies ever made; a sample of critics in 2002 placed it among the top ten movies of all time. It was nominated for four Academy Awards, and it was given an award for visual effects. In 1991, it was thought to be "culturally, historically, or aesthetically significant" (i.e. important for culture, history and aesthetics) by the United States Library of Congress and was chosen to be kept in their National Film Registry.