Provides a library of functions and routines written in the Interactive Data Language (IDL). Developed mainly for use in astronomy, the library also supplies general scientific and programming applications.

Features the following programs: an ephemeris calculator, a collection of astronomical data in electronic form, Planet Orbits, C88, and Planetary, Lunar, and Stellar Visibility.

Observation planning software for astronomers. Includes telescope control, logging, and charting.[Commercial - Windows]