The Universe in your computer

WinStars is a planetarium running on computers, tablets and mobiles. It is a 3D simulator that accurately represents celestial objects at a given time. It also allows you to travel in our galaxy and its close neighbourhood. A thread dedicated to scientific news allows you to follow and display in the software the results of research currently conducted in astrophysics. WinStars is a software in constant evolution. New functions are regularly added to make it an educational tool dedicated to the discovery of our Universe.


WinStars 3 is now compatible with the Raspberry Pi computers

The Raspberry Pi is a  small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation in association with Broadcom. The Raspberry Pi was created to democratise access to computers. Available for less than 40€ in its basic version, it offers several variants of the free GNU/Linux operating system but also works with …

Jupiter and Saturn: Great conjunction 2020

A Great conjunction is a conjunction of the planets Jupiter and Saturn. Great conjunctions occur regularly (every 19.6 years, on average) due to the combined effect of Jupiter’s approximately 11.86-year orbital period and Saturn’s 29.5-year orbital period and due to the proximity of the orbits of the planets. The upcoming Great conjunction will occur on …



Release 3.0.213 (2021/06/07):

version x64 (Windows 10 only)

version x86 (compatible with Windows 7, 8.1 & 10)

(Warning: using WinStars 3 on an obsolete machine running Windows 7 may cause serious compatibility problems).

If you want to update an existing installation of WinStars3, please use the Maintenance Tool located in the main WinStars3 folder (typically c:\program files\winstars3).


The Android version doesn’t always receive unanimous approval, but I don’t always understand what is wrong with it. Please subscribe to this test and let me know your feedback:

macOS X

on App Store :


A beta version is available on TestFlight!

Ubuntu 20.04 x64 LTS or later

Release 3.0.213 (2021/06/07):

Follow this procedure

Raspberry Pi 4 (Raspberry Pi OS)

Release 3.0.209 (2021/06/07):

Follow this procedure