    Sentence 1: Slang's ‘space cadet ‘an  fc, especially one. who is stuporous   touch with reality’ evolved from  ‘orbett, Space Cadet, a 1950  television series depicting the adventures  of a 2th-century cadet in the Solar  Guides, the interplanetary police force    keeping order in the Solar Alliance.               Sentence 2: The 1950s television series was  ‘critically acclaimed for-its rievel approach  to science-fiction.