AstroGrav has superb interactive 3D animated graphics, in the form of view windows. View windows let you view a simulation in the form of a three-dimensional model which you can manipulate and navigate around, while watching the simulation evolve with the passage of time. The phases of non-luminous objects (planets, moons, asteroids, etc) are correctly displayed, and you can even attach your viewpoint to an object so that you can watch the evolution of the simulation from the object's point of view.

AstroGrav is an astronomy software software that allows you to simulate how astronomical objects move and interact under the force of gravity. It features superb interactive 3D graphics which allow you to move around within a many-body astronomical system, while watching how it evolves with the passage of time.

An installation of AstroGrav contains the following files.
1. AstroGrav.exe: The double-clickable application.
2. Documents: The documentation.
3. Java: The Java Runtime Environment.
4. License.txt: The program license agreement.
5. Read Me.html: This 'Read Me' file.
6. Sample Simulations: The sample simulations.

A wide variety of sample files are provided, including Solar System, space mission, and abstract systems, and these enable you to experiment with the astronomy program without having to enter your own data. The comprehensive editing facilities allow you to either create your own astronomical systems, or to modify existing ones, and provide you with an almost endless scope for experimentation and investigation.

AstroGrav can be used to visualize and understand the following aspects of gravitational systems and astronomical systems.
1. Basic concepts of mass, position, velocity, acceleration, force, momentum, and energy.
2. Kepler's Laws of Planetary Motion and Newton's Law of Gravitation.
3. Many body systems and the n-body problem.
4. Orbits and Lagrange points.
5. Interchange of potential energy and kinetic energy in gravitational systems.
6. Projectiles and escape velocities.
7. Gravitational slingshots used in space missions.

Interactive 3D Animated Graphics
View windows also allow you to do the following.
1. Display the distance, speed, magnitude, and phase of selected objects.
2. Display the angles between objects.
3. Change the magnification and brightness of the window.
4. Show or hide the names of objects.
5. Show or hide the velocities of objects.
6. Show or hide the accelerations of objects.
7. Show or hide the orbits of objects.
8. Show or hide the coordinate axes.

You can have several view windows displayed at once, so that you can (for example) use one window to view the entire systen, another to view a close-up of an area of interest, and a third to view the system from the viewpoint of a particular object.

Other Ways of Viewing a Simulation
In addition to view windows, AstroGrav allows you to view a simulation as a table of data, a tree showing the object hierarchy, or as details of any desired object.

Dynamic Calculation of Object Orbits
AstroGrav dynamically calculates the instantaneous orbits (also known as osculating orbits) of objects as a simulation evolves. The display of orbits in view windows helps you to visualize the three-dimensional structure of a simulation, and the numerical values of the orbital parameters are displayed in table windows and object windows. Watching how the orbits change as a simulation evolves allows you to study how the interactions between objects alter and distort the objects' orbits.

Comprehensive Editing Facilities
AstroGrav provides a comprehensive range of editing facilities for setting up and modifying your own simulations. These facilities allow you to add, remove, and modify single objects, and there is also a facility for adding entire families of objects. You can edit the date/time of a simulation, modify the units used to express physical quantities, and add notes to a simulation in order to keep a record of how the simulation was created, and how it is to be used. A sophisticated undo/redo facility is also provided to allow you to undo and redo as many changes as you like.

Illustrative Sample Simulations
A wide variety of sample simulations are provided, and these enable you to experiment with AstroGrav without having to go to the trouble of creating your own simulations. These sample simulations include Solar System simulations, space mission simulations, and abstract simulations, as a well as a simulation specially provided for use with the tutorial. Each sample simulation has accompanying notes explaining what the simulation is and what you can do with it.

SoftSea.com had fully tested and uploaded the install files, AstroGrav does not contain any adware or spyware, the latest version is 1.9.4, you can download this software (17.36 MB) from special server of SoftSea.com.

The license of this software is Free Trial Software, the price is $59.00, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of AstroGrav, you can buy this 3d graphic software software.