Browse free open source Astronomy software and projects below. Use the toggles on the left to filter open source Astronomy software by OS, license, language, programming language, and project status.

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  • 1
    Stellarium

    Stellarium

    A planetarium software that shows a 3D simulation of the night sky

    Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets, nebulae and others things like ground, landscape, atmosphere, etc.
    Leader badge
    Downloads: 2,993 This Week
    Last Update:
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  • 2
    Celestia

    Celestia

    Real-time 3D visualization of space

    Celestia is an application for real-time 3D visualization of space, with a detailed model of the solar system, over 100,000 stars, more than 10,000 galaxies, and an extension mechanism for adding more objects.
    Downloads: 81 This Week
    Last Update:
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  • 3
    ChronosXP is a planetary hours astrology program for Windows. It runs from the system tray where it displays a glyph corresponding to the current planetary hour. Planetary hours/days can also be viewed for any given time or location.
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    Downloads: 27 This Week
    Last Update:
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  • 4
    Astrology software inspired by the SYMBOLON deck. This software calculates the planet positions and make symbolon card tables according to the calculated constellation. It can draw the classical circular horoscope also.
    Downloads: 8 This Week
    Last Update:
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  • 5
    Calculate Sunrise, Sunset and dawn times. The calculation based on sunriset by Paul Schlyter. 64 bit windows users: There are 64 bit windows binarys in the file section.
    Downloads: 7 This Week
    Last Update:
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  • 6
    Java version of Stellarium.
    Downloads: 0 This Week
    Last Update:
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  • 7
    A helper function set written in bash to support DSLR image stacking with IRAF.
    Downloads: 0 This Week
    Last Update:
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