Question:  Within what angle of the
      <a href="http://en.wikipedia.org/wiki/Celestial_pole">NCP</a>
      are <a href="http://en.wikipedia.org/wiki/Astronomical_object">astronomical objects</a>
      northern <a href="http://en.wikipedia.org/wiki/Circumpolar_star">circumpolar</a> for
      a given location in the <a href="http://en.wikipedia.org/wiki/Northern_hemisphere">Northern Hemisphere</a>?
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      Answer in sentence form.
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