Space Engine!

Celestia is a free real-time 3D space simulation, allowing unrestricted access to hundreds of thousands of stars.

No Man's Sky is a procedurally generated open universe game.

Gaia Sky is a real-time, 3D, astronomy visualisation software that runs on Windows, Linux and OS X. 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).

Orbiter is a realistic 3D real-time space flight simulator program.

Visit distant exoplanets on a thrilling journey through our galaxy!

Ad Astra is an open-ended space exploration game which has attempted to model a Galaxy of over 110,000 real stars based on the 1997 Hipparcos Star Catalogue. The application supports fractal planets, procedural flora and fauna with uninterrupted game play whilst within a particular solar system.

WinStars uses the latest 3D technology to show the objects of our solar system in a realistic manner. Thus, it is possible to move from one planet to another, to follow a space probe on its long voyage or to observe a celestial event from a place to which you could never go. The use of the Jet Propulsion Laboratory’s DE 404 planetary theories allows us to have a precise representation of the events displayed.

Stellarium Mobile is a fully-featured planetarium for your phone. It shows a realistic night sky map in 3D, just like what you see with the naked eye, binoculars or a telescope.

SourceForge presents the Solar Model project. Solar Model is an open source application. SourceForge provides the world's largest selection of Open Source Software. The Solar Model is real time modeling of solar system. It allows user to navigate in space, to control time counting (speed-up time flow) and estimate movement of space bodies, bind camera to space objects (for example, from Moon on Earth in real time).

3D simulation of the Solar System and night sky - real time virtual orrery and observatory