libTheSky

Fortran library to compute positions of celestial bodies

Status: Beta

Brought to you by: marcvdsluys

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Last Update: 2026-04-06

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libTheSky is a Fortran library to compute positions of celestial bodies (Moon, planets, stars) and events (conjunctions, eclipses). It forms the core of the software that produces the Dutch popular-astronomy website http://hemel.waarnemen.com

Project Samples

Conjunction between the Moon and Jupiter in the constellation of Taurus, computed using libTheSky

Occultation by the Moon, computed using libTheSky

Opposition of minor planet Vesta, computed using libTheSky

Moon-phases calendar, computed using libTheSky

Project Activity

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License

GNU General Public License version 3.0 (GPLv3)

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Additional Project Details

Operating Systems

BSD, Linux

Languages

Dutch, English

Intended Audience

Advanced End Users, Developers, Engineering, Science/Research

User Interface

Command-line

Programming Language

Fortran

Related Categories

Fortran Astronomy Software, Fortran Libraries

Registered

2011-01-05

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