AstroGrav is a full-featured, high precision solar system simulator that calculates the gravitational interactions between all astronomical bodies, so that the motions of asteroids and comets are simulated much more accurately than with planetarium applications. The effects of general relativity and radiation pressure can be taken into account, and superb interactive 3D viewing allows you to easily rotate and zoom your view while the solar system evolves.
The AstroGrav software has a huge range of features and viewing options, including views from space or any object, planetarium-style views from any location on Earth, multiple views animated simultaneously, dynamically calculated orbits and trajectories, comprehensive tabular data, and simulation time steps from a fraction of a second to thousands of years. Constellations and over 100,000 background stars are included, with comprehensive data for every star. Several different celestial coordinate grids and a wide range of physical units are available, and editing facilities allow you to create new objects manually, or import from hundreds of thousands of asteroids and comets.
Because it calculates the motions of bodies from their gravitational interactions, AstroGrav is not restricted to just the solar system. Any situation in which gravity is the only significant force can be simulated, and the illustrative sample files that are included with AstroGrav include many examples such as exoplanet systems, protoplanets that evolve into planetary systems, rubble piles and their interactions with massive bodies, complex star systems, and even projectiles and bouncing balls.
AstroGrav is ideal for astronomers, astrophysicists, researchers, teachers, educationalists, and students, and comes complete with a tutorial and full documentation. A fully functional 15 day trial version is available for download and evaluation.
» version 3.4 - posted on 2016-12-16
Expanded the choice of object types. Added the display of angles between objects. Added a text export command. Improved ephemeris generation. Added celestial coordinates data. Enhanced the handling of background stars. Improved the sample simulations. Various minor bug fixes and improvements.
» version 1.4.1 - posted on 2007-04-03
Speeded up the graphics drawing on model windows. Added the STEREO spacecraft sample simulation. Corrected colors of major Solar System objects in the sample simulations. Model window duplication when a simulation is evolving now works correctly. Various minor bug fixes and improvements.
EULA - End User License Agreement
ASTROGRAV SOFTWARE LICENSE AGREEMENT
PLEASE READ THIS SOFTWARE LICENSE AGREEMENT ("LICENSE") CAREFULLY BEFORE USING THE ASTROGRAV SOFTWARE. BY USING THE ASTROGRAV SOFTWARE, YOU ARE AGREEING TO BE BOUND BY THE TERMS AND CONDITIONS OF THIS LICENSE. IF YOU DO NOT AGREE WITH THESE TERMS AND CONDITIONS, YOU MAY NOT USE THE ASTROGRAV SOFTWARE, AND MUST PROMPTLY DELETE IT FROM YOUR COMPUTER(S).
This LICENSE defines what you may and may not do with the AstroGrav Software, and contains limitations on warranties and liabilities. If you are unable or unwilling to accept these conditions in full, then, notwithstanding the conditions in the remainder of this LICENSE, you may not use the program at all.
15-DAY TRIAL LICENSE
A 15-day trial license allows you to use an unregistered copy of the AstroGrav Software for evaluation purposes for a trial period of fifteen (15) days following the initial installation of the software. At the end of this trial period, you must either register the AstroGrav Software by purchasing a license, or remove it from your computer(s). You may redistribute an unregistered copy of the AstroGrav Software by any means (CDROM, cover disk, web site, etc) as long as you do not change the original package, and distribute only the original package.
Single-user registration grants you a non-exclusive, non-transferable license to use the AstroGrav Software on a single computer. You may install the AstroGrav Software on more than one computer, provided that you only use one copy of the AstroGrav Software at any one time.
Site registration grants you a non-exclusive, non-transferable license to use the AstroGrav Software on any number of computers that are physically located at the licensed site. The AstroGrav Software may not be used outside of the network that covers the physical location of the licensed site.
You MAY NOT:
(1) sublicense, lease, rent, or sell the AstroGrav Software to any other party;
(2) cause or permit reverse engineering, disassembly, decompilation, or modification of the AstroGrav Software;
(3) remove any product identification, copyright notices, or other notices or proprietary restrictions from the AstroGrav Software;
(4) transfer registration details to any other party without the express written permission of AstroGrav Astronomy Software.
TERM OF LICENSE
This LICENSE shall continue for as long as you use the AstroGrav Software according to the terms of this agreement. However, this LICENSE will terminate if you fail to comply with any of its terms or conditions. You agree, upon termination, to destroy all copies of the AstroGrav Software.
The AstroGrav Software and its source code are owned by AstroGrav Astronomy Software and are protected by copyright law, international copyright treaty, and other intellectual property laws. The AstroGrav Software is licensed and not sold. You acquire only the right to use the AstroGrav Software and do not acquire any rights, either expressed or implied, in the AstroGrav Software other than those specified in this LICENSE.
YOU EXPRESSLY ACKNOWLEDGE AND AGREE THAT USE OF THE ASTROGRAV SOFTWARE IS AT YOUR SOLE RISK AND THAT THE ENTIRE RISK AS TO SATISFACTORY QUALITY, PERFORMANCE, AND ACCURACY IS WITH YOU. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE ASTROGRAV SOFTWARE IS PROVIDED "AS IS", WITH ALL FAULTS, AND WITHOUT WARRANTY OF ANY KIND, AND ASTROGRAV ASTRONOMY SOFTWARE DISCLAIMS ALL WARRANTIES AND CONDITIONS WITH RESPECT TO THE ASTROGRAV SOFTWARE, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A PARTICULAR PURPOSE, AND ACCURACY.
LIMITATION OF LIABILITY
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL ASTROGRAV ASTRONOMY SOFTWARE OR ITS SUPPLIERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, LOSS OF DATA, BUSINESS INTERRUPTION, OR ANY OTHER COMMERCIAL DAMAGES OR LOSSES) ARISING OUT OF YOUR USE OF OR INABILITY TO USE THE ASTROGRAV SOFTWARE, EVEN IF ASTROGRAV ASTRONOMY SOFTWARE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN ANY CASE, ASTROGRAV ASTRONOMY SOFTWARE'S ENTIRE LIABILITY UNDER ANY PROVISION OF THIS LICENCE AGREEMENT SHALL BE LIMITED TO THE AMOUNT ACTUALLY PAID BY YOU FOR THE PRODUCT.
HIGH RISK ACTIVITIES
THE ASTROGRAV SOFTWARE IS NOT DESIGNED, MANUFACTURED, OR INTENDED FOR USE IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL SYSTEMS, LIFE SUPPORT MACHINES, WEAPONS SYSTEMS, OR OTHER EQUIPMENT IN WHICH THE FAILURE OF THE ASTROGRAV SOFTWARE COULD LEAD TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE. ASTROGRAV ASTRONOMY SOFTWARE SPECIFICALLY DISCLAIM ANY EXPRESSED OR IMPLIED WARRANTY OF FITNESS FOR "HIGH RISK ACTIVITIES".
If any provision of this LICENSE is found void or unenforceable, the remainder will remain valid and enforceable to the fullest extent permitted by applicable law. In such event, each provision of this LICENSE which is invalid or unenforceable shall be replaced with a valid and enforceable provision as similar in terms to such invalid or unenforceable provision as may be possible.