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Space News Archive - April 23, 2010

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NASA's best-recognized, longest-lived, and most prolific space observatory zooms past a threshold of 20 years of operation this month.

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The United States Air Force launched a small-scale space shuttle on Thursday aimed at testing the next-generation version of the craft.

Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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