This solar system simulator calculates gravitational interaction between astronomical bodies and simulates the motions of asteroids and comets. The software offers 3D viewing and precise calculations.

This software provides an extensive range of features and view options, including views from space or any object and planetarium-style views from any point on Earth. Users can also view multiple views simultaneously and access dynamically calculated orbits and trajectories, comprehensive tabular data, and simulation time steps ranging from a fraction of a second to thousands of years. With data for over 100,000 background stars and comprehensive information for every star, constellations are also included. Furthermore, users have access to several celestial coordinate grids and a selection of physical units, plus editing facilities to create objects manually or import from hundreds of thousands of asteroids and comets.
AstroGrav is not limited to the solar system, as it calculates the motions of bodies based on their gravitational interactions. Users can simulate any situation where gravity is the primary force. The software also includes illustrative sample files to showcase examples such as exoplanet systems, evolving protoplanets, rubble piles and their interactions with massive bodies, complex star systems, and even projectiles and bouncing balls.
Designed for astronomers, astrophysicists, researchers, teachers, educationalists, and students, AstroGrav is a must-have software for those in the space sciences. It comes complete with a tutorial and full documentation for easy use.
Version 5.0.1: Enhanced table popups to show data in all available units when the 'Alt' key is depressed. Restored the 'Window/Bring All to Front' command. Corrected a fault that prevented popups from working below the horizon when the viewpoint is attached to a location. Various minor bug fixes and improvements.
Version 5.0: Added a new and much more accurate evolution algorithm. Improved the ephemeris generator. Extended locations for viewing and ephemerides to the Sun, Moon, and planets. Completely revised and reorganized the sample simulations, adding many new simulations. Various minor bug fixes and improvements.
Version 4.5.3: Corrected a serious evolution fault. Improved manually drawn angles on view windows. Added extra information to view window popups, particularly when the 'Alt' key is depressed. Corrected a fault that prevented 'Edit/Split Object...' from working correctly. Various minor bug fixes and improvements.