Hes·per·us /ˈhɛsp(ə)rəs/
  黃昏星,金星
  Hes·pe·rus n.
  1. Venus when she is the evening star; Hesper.
  2. Evening. [Poetic]
  The Sun was sunk, and after him the Star
  Of Hesperus.   --Milton.
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  Hesperus
       n : a planet (usually Venus) seen at sunset in the western sky
           [syn: evening star, Vesper]