Open Source Windows Astronomy Software
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Astronomy Software for Windows
View 34 business solutionsBrowse free open source Astronomy software and projects for Windows 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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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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astap program
Stacking program, astrometric (plate) solver, fits file viewer
ASTAP, Astrometric STAcking Program, astrometric solver and FITS image viewer. This program can view, measure, "astrometric (plate) solve" and stack deep sky images. Main features: - Stacking of astronomical images including dark frame and flat field correction - Native fast astrometric (plate) solver. - Alignment using an internal star match routine, internal Plate Solver, manual or ephemeris. - FITS viewer with swipe functionality, deep sky and star annotation, photometry and CCD inspector. - Annotation of solar and deepsky objects. - Photometry of point sources, extended sources and variable stars - Blink routine for astro images. -
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SkyChart is a software to draw chart of the night sky for the amateur astronomer from a bunch of stars and nebulae catalogs. See main web page for full download. This software is part of a full suite for astronomical observation: https://sourceforge.net/projects/ccdciel/ https://sourceforge.net/projects/indistarter/ https://sourceforge.net/projects/eqmodgui/ Requirement: https://sourceforge.net/projects/libpasastro/ See also: https://sourceforge.net/projects/indi/
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Arduino ASCOM Focuser Pro2 DIY
Version 2 of the myFocuser Project
myFocuserPro2 (myFP2) is an ASCOM - INDI - LINUX - WINDOWS telescope focuser with a large range of options. 315,606+ file downloads. The most popular focuser project. (c) Copyright Robert Brown 2014-2026. All Rights Reserved. Code or portions of code may not be copied or used without written permission from the author. Other Focuser Projects myFP2ESP32 WiFi - https://sourceforge.net/projects/myfocuserpro2-esp32/ [ESP32 Only] myFP2ESP8266 WiFi - https://sourceforge.net/projects/myfp2esp8266-focus-controller/ myFP2N - Nextion touch screen display - https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/myFocuserPro2N%20NEXTION%20TFT%20DISPLAY/ myFP2M - Ready made Controllers https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/myFocuserPro2M/ Please look in the Files-Documents folder for more information. https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/Documentation/ -
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Software for Moon observation and survey. Let you visualize the real Moon aspect at every time. Also help to study any lunar formations using feature database and pictures library.
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Gpredict
Real time satellite tracking and orbit prediction
Gpredict is a real-time satellite tracking and orbit prediction application. Gpredict can track an unlimited number of satellites and display the data in tables and various graphical view. -
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Arduino ASCOM Focuser Pro DIY
Arduino Focuser, fully ASCOM complaint
myFocuserPro is an ASCOM and Moonlite compatible stepper motor telescope focus controller (DIY) based on Arduino Nano/Uno. A popular DIY ASCOM focuser with more than 121,000+ downloads. (c) Copyright Robert Brown 2014-2024. All Rights reserved. Permission is granted for personal and Academic use only. Spreadsheet to calculate what stepper motor to use. https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/Documentation/Nema-Stepper-Motors.xlsx/download -
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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. -
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The EQ mounts' internal electronics provides pointing accuracy to .144 arcsecs. EQMOD connects the EQ directly to a serial comms. This project has the source files for the Public releases of the EQMOD ASCOM driver, associated programs and an EQMOD compatible hardware design. Please note that later test releases for all EQMOD Project software may be available via the EQMOD Yahoo group.
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PreviSat
Satellite tracking software
PreviSat is a satellite tracking software for observing purposes. Very easy to use, it shows positions of artificial satellites in real-time or manual mode. PreviSat is able to make predictions of their passes, predictions of MetOp and COSMO-SkyMed flares, transits of all satellites, predictions of Starlink satellites passes and several other calculations. -
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The C-Munipack is an astrophotometry software package, which offers a complete solution for reduction of images carried out by CCD or DSLR camera, intended on a observation of variable stars, exoplanets and minor Solar System bodies. It provides a simple and intuitive graphical user interface.
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CCDciel
Astronomy CCD capture software
A CCD capture software intended for the amateur astronomer. It include all the features required to perform digital imaging CCD observation of celestial objects. Using the standard drivers protocol INDI and ASCOM it can connect and control the CCD camera, the focuser, the filter wheel and the telescope mount. This software is part of a full suite for astronomical observation: https://sourceforge.net/projects/skychart/ https://sourceforge.net/projects/indistarter/ https://sourceforge.net/projects/eqmodgui/ Requirement: https://sourceforge.net/projects/libpasastro/ See also: https://sourceforge.net/projects/indi/ -
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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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Xplanet is a solar system simulator which calculates accurate positions for the major planets and satellites. It displays multiple bodies, eclipse shadows, and customizable labels and markers.
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mySQM+ DIY SQM WEATHER STATION
ESP32 mySQM+ Sky-Meter/Weather Station with loads of features
mySQM+ Sky Quality Meter/Weather Station (c) R Brown, 2020-2025, All rights reserved. Permission is granted for personal and Academic use only. Code or portions of code may not be copied or used without appropriate credit given to author(s). EXPANSION BOARDS - You can expand this project using the two types of project expansion boards at https://sourceforge.net/projects/myesp-boards/ -
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libpasastro
Provide Pascal interface for standard astronomy libraries
Provide shared libraries to interface Pascal program with standard astronomy libraries. libpasgetdss.so : Interface with GetDSS to work with DSS images. libpasplan404.so: Interface with Plan404 to compute planets position. libpaswcs.so : Interface with libwcs to work with FITS WCS. This libraries are used with the following projects: https://sourceforge.net/projects/skychart/ https://sourceforge.net/projects/ccdciel/ https://sourceforge.net/projects/virtualplanet/ https://sourceforge.net/projects/virtualmoon/ -
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Astrolog
Astrology calculation, charting, and analysis
Astrolog is astrology software featuring many types of computation, display, graphics, comparison, and analysis. It supports multiple environments, such as MS Windows and Unix X Windows, with complete C++ source code available. For more information see the Web site: http://www.astrolog.org/astrolog.htm -
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Project Apollo - NASSP (also known as NASSP or NCPP) is an add-on for the Orbiter space flight simulator. Project Apollo simulates the Apollo missions to Earth orbit and the Moon and the planned post-Apollo missions that never flew.
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echoes
Echoes is a radio spectral analysis software for SDR devices
Echoes it's a radio spectral analysis software for SDR devices, designed for meteor scattering purposes. The older releases supported only RTL-SDR devices. They are very cheap SDR based on DVB-T TV tuner dongles based on Realtek's RTL2832U chipset. Starting from 0.50 Echoes embeds SoapySDR allowing the support of many other SDRs. Echoes doesn't demodulate neither decode any human-made signal. Its main goal is to analyze and record the total power of natural signals and generate screenshots and tabular data (CSV,) output in presence of particular peaks in a selected narrow range of frequencies. Since there is no demodulation, there is no provision for audio listening, except for a notify sound when an event has been recorded. Finally, Echoes can also operate getting an audio input, thus producing audio spectra. This way, Echoes can also be used with traditional receivers. -
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p3d
General data-reduction tool for fiber-fed integral-field spectrographs
p3d is a general data-reduction tool for use with fiber-fed integral-field spectrographs (IFSs); although, the spectrum viewer works with spectrum data cubes of any origin. The tool is built about the proprietary software IDL (Harris/EXELIS; see http://www.harrisgeospatial.com), but can be used without any license. Most slowly running loops are implemented in parallelized C (OpenMP). -
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ASIStudio
All-in-one Astrophotography Software Works on multi-OperatingSystem
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PROPER Optical Propagation Library
Routines for wavefront propagation in IDL, Matlab, and Python
PROPER is a library of routines for the propagation of wavefronts through an optical system using Fourier-based methods. It was developed at the Jet Propulsion Laboratory for modeling stellar coronagraphs, but it can be applied to other optical systems were diffraction propagation is of concern. It is currently available for IDL (Interactive Data Language), Matlab and Python (3.x). It includes routines for generating complex apertures and obscurations and aberrations (Zernike & PSD-defined). It includes a model of a deformable mirror for wavefront control. The routines perform near and far field propagation with automatic selection of propagators. The latest version is v3.3.1 (IDL & Matlab) and v3.3.4 (Python). Please report any bugs using the Tickets tab. -
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Arduino Nano Dew Controller Pro (DIY)
Dew Controller Feature Rich
A 3-channel fully automated Dew Controller (DIY project) based on Arduino Nano for telescopes. For $48 or less. (c) Copyright Robert Brown 2014-2025. All Rights Reserved. Permission is granted for personal and Academic use only. Code or portions of code may not be copied or used without appropriate credit given to author. A very popular project with over 48,000 downloads. There is a new ESP32 WiFi version at https://sourceforge.net/projects/esp32-dew-controller/ The older myDCP2 (two-channel dew controller) is found here https://sourceforge.net/projects/arduinonanodewcontrollerpro/files/myDewController%20v200%202channel/ -
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myFP2ESP32-Dev WiFi ASCOM Focuser
ASCOM-INDI ESP32-Dev Wifi focuser
An ESP32-Dev WiFi focuser. DIY or PCB designs. (c) Robert Brown 2014-2025, Holger M, 2019-2021. All rights reserved. Code or portions of code may not be copied or used without appropriate credit given to authors. Spreadsheet to calculate what stepper motor to use. https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/Documentation/Nema-Stepper-Motors.xlsx/download Spreadsheets to calculate CFZ https://sourceforge.net/projects/myfocuserpro2-esp32/files/CFZ%20Spreadsheets/CFZ%20Spreadsheets.zip/download Focuser Basics Guide (PDF) - shows how to derive the correct motor requirements for your system (mandatory reading) https://sourceforge.net/projects/myfocuserpro2-esp32/files/Documentation/Focuser%20Basics.pdf/download Part1: Download, Configuration and Programming https://youtu.be/90KeSspN3e0 Project is superceded by myESP32S3-N16R8 WiFi Focuser -
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HNSKY
Hallo Northern Sky planetarium program
Welcome to the semi professional free planetarium program HNSKY for MS-Windows and Linux. This program can control your telescope via the ASCOM or INDI interface, has a comprehensive up to date deep sky database with 30.000 objects and detailed descriptions. A star database with millions of stars and hundreds of Deep Sky Survey images which blends in accurately. Additional the program can access the online version of the Deep Sky Survey allowing online update of the asteroid and comet databases and it can search on-line in professional astronomical databases. Is provided with menu's in 22 languages and it is totally free without any advertisement or restriction!! Free with 30.000 deep sky objects and native star databases up to magnitude 18. Online access to GAIA DR2, UCAC4, NOMAD and PPMXL star catalogues or download the USNO UCAC4 up to magnitude 16. The Sun, Moon, the planets and their major moons are all displayed with surface features. It maps the position of co
