Welcome to Clear Sky Institute, Inc.

Serious Astronomical Systems and Tools

  • XEphem
    Full-featured astronomy application for all UNIX-like systems including Linux and MacOS X.
  • ephem
    A classic yet comprehensive 24x80 screen-oriented ephemeris program with that retro-look.
  • Personal Sky Chart
    Hold the universe to Mag 15 in your hand with your Sharp Zaurus PDA.
    New Version 1.3 controls your LX200
  • Consulting
    CSI Inc offers complete observatory control software and consulting engineering services.


CSI logo About CSI

For more information, contact us at info@ClearSkyInstitute.com

Launch the HP-35 by Neil Fraser