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AstroGrav (Windows) 1.7.1


AstroGrav (Windows) 1.7.1

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AstroGrav (Windows) 1.7.1 Ranking & Summary

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User Review: 0 (0 times)
File size: 22.24 MB
Platform: Windows2000, WinXP, Windows Vista Starter, Wi
License: Shareware
Price: $59
Downloads: 16
Date added: 2009-05-09

AstroGrav (Windows) 1.7.1 description

AstroGrav (Windows) 1.7.1 is professionally designed as an astronomy software program that lets you stimulate 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.

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 software 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.
  • Basic concepts of mass, position, velocity, acceleration, force, momentum, and energy.
  • Kepler's Laws of Planetary Motion and Newton's Law of Gravitation.
  • Many body systems and the n-body problem.
  • Orbits and Lagrange points.
  • Interchange of potential energy and kinetic energy in gravitational systems.
  • Projectiles and escape velocities.
  • Gravitational slingshots used in space missions.
AstroGrav calculates how astronomical objects move according to Newton's Law of Gravitation, and displays the results as they are calculated so that you can watch the system evolve as in a movie. The astronomy software is very accurate, dynamically calculates orbits as a system evolves, deals correctly with object collisions, and can cope simultaneously with objects on many different timescales.

AstroGrav is ideal for any of the following.
  • Astronomers interested in studying the evolution of gravitational systems.
  • Teachers and educationalists seeking to deliver courses on math, physics, or astronomy.
  • Students of math, physics, or astronomy.
  • Anyone else interested in studying how objects move and interact under the force of gravity.
AstroGrav has superb interactive 3D animated graphics, in the form of model windows. Model 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.

Major Features:

  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.


  1. Speeds of Selected Objects
    Version 1.7.1 of AstroGrav includes the addition of an object's speed to its label on a model window. If you select an object on a model window, you will now see its name, distance, speed, and magnitude (plus phase for a non-luminous object) displayed next to it in a condensed form. Like the other quantities, the speed is relative to the current viewpoint, so that it will change when you move your viewpoint even if the system is not evolving at the time.
  2. Expanded Information Popups
    Version 1.7.1 of AstroGrav includes an improvement to the information popups that appear when you hover the mouse over an object on a model window. The speed and magnitude (plus phase for a non-luminous object) have been added to the name and distance that were displayed previously. This means that an information popup now displays the same information that is displayed next to a selected object, so that you can now see this information without having to select the object.
  3. Other Improvements
    • A bug has been fixed that could prevent the program from running at all on a small proportion of Windows PCs.
    • A preview panel has been added to the color chooser, and this shows both the old and the new color so that you can easily compare the two.
    • A bug has been fixed that could cause unwanted gaps to appear in velocity, acceleration, and coordinate axis lines on model windows.
    • A bug has been fixed that could cause the program to crash after attempting to edit a non-editable field in the object editor.
    • The standard keyboard shortcuts for closing windows have been added to the About, Model Navigation, and Choose Color dialogs.
    • There are several minor performance improvements.
    • There are several corrections and minor improvements to the documentation and tutorial. 

Requirements: 500 MHz PowerPC G3 processor, Mac OS X 10.2 minimum, 128 MB RAM, 50 MB disk space

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