Gaia Sky is an astronomy visualisation platform for desktop and VR that runs on Linux, Windows and macOS. It is developed in the framework of ESA's Gaia mission to chart about 1 billion stars of our Galaxy in the Gaia group of the Astronomisches Rechen-Institut (ZAH, Universität Heidelberg). Explore the Solar System, the Milky Way, and even the most distant galaxies of our Universe with up-to-date, real scientific data.