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| http://www.astromist.com/pages/download.html 
 free 版有些 limit
 
 Free Astromist version
 
 Before Downloading Astromist, you need to install mathlib library. MathLib is a shared library on PalmPilot which provides a complete set of double-precision mathematical functions. This library is a free software covered by the GNU General Public License.
 
 Download the latest version:October 1 2005, Astromist 2.1.zip 1.2Mb
  http://www.astromist.com/documents/astromist_21.zip
 
 # This version is complete but you are limited: to select a maximum of 5 objects at a time,
 # to search an object only inside a small catalog,
 # you have only the 200 biggest moons craters in moon map,
 # no Mars feature catalog,
 # limited date and time modification inside some simulators,
 # you are not able to keep your configuration,
 # bluetooth is disabled.
 
 userGuide
 http://www.astromist.com/documents/astromist_21_user_guide.pdf
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