Open Source Astronomy Software

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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.
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    344 Reviews
    Downloads: 2,866 This Week
    Last Update:
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  • 2
    CollimationCircles

    CollimationCircles

    Collimation Circles, app for easy telescope collimation

    This program was inspired by Mire De Collimation program written by Gilbert Grillot and Al's Collimation Aid. I combined best features of both and addes some of my own. Purpose of this program is not to reinvent the wheel, but rather to learn new technologies, become better at colimating my telescope and to learn something new. Main purpose of this program is to help you with aligning optical elements of your telescope such as secondary mirror, primary mirror, focuser, etc. Collimation Circles is developed with .NET 7 and AvaloniaUI Framework using MVVM architecture patern. Program was tested on Windows 10 and 11, Ununtu Linux 22.04.1 LTS (Wayland) and Raspberry PI OS Bullseye. I'm not able to test it on macOS, but it should work. Suggestions and contributions are welcome!
    Downloads: 11 This Week
    Last Update:
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  • 3
    Desktop gadget (Windows only). The simulation of a real horizontal sundial, dependent on a geographic position (latitude). Size can be chosen between big and small. It can use current (computer) time, or user-specified date&time.
    Downloads: 0 This Week
    Last Update:
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