AstroGrav
AstroGrav 2.2.1
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Study motion of astronomical objects and interaction with gravity.   Shareware ($79.00)
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AstroGrav is a software program that allows you to study how astronomical objects move and interact under the force of gravity. It features superb interactive 3D graphics which allow you to move around within an astronomical system that you are viewing, 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 AstroGrav without having to go to the trouble of entering your own data. The comprehensive editing facilities allow you
What's New
Version 2.2.1:

Object Import Improvements:

  • Comet and asteroid import tables have had a menu of categories added that allows you to quickly pick out particular categories of comets and asteroids. The following categories are available for comets:
    • All Comets
    • Near-Earth Comets
    • Short Period Comets
    • Long Period Comets
    • Hyperbolic Comets
    and the following categories are available for asteroids:
    • All Asteroids
    • Near-Earth Asteroids
    • Inner-Earth Asteroids
    • Atens
    • Apollos
    • Amors
    • Earth Trojans
    • Mars Trojans
    • Main Belt Asteroids
    • Jupiter Trojans
    • Centaurs
    • Neptune Trojans
    • Kuiper Belt Objects
    • Scattered Disc Objects
    • Detached Objects
  • If you hover your mouse pointer over one of the asteroid or comet categories, a little window pops up showing you the exact definition that AstroGrav uses for filtering the table.
  • A bug has been fixed that caused Julian Days to be incorrectly rounded in asteroid and comet import tables.
  • A bug has been fixed that caused the 'Refresh Data' query to be shown whenever the window was resized.
  • A bug has been fixed that sometimes caused AstroGrav to crash when attempting to download data whilst not connected to the internet.
View Window Improvements:
  • The View / Show / Barycenters command has been enhanced to show the barycenters of all families of objects, instead of just showing the barycenter of the entire system. Among other things, this allows you to quickly pick out families of gravitationally bound objects in complex and quickly changing simulations such as globular clusters.
  • After searching for an object with the Edit / Find... command, the found object is placed at the center of the window instead of near the edge.
  • The ecliptic grids and equatorial grids have been made to look a lot better by showing less longitude lines and less latitude labels near the poles.
  • The way that dragging the mouse works when moving to/from the fixed object has been changed to make it easier to use, particularly when the fixed object is not visible in the window. In earlier versions, dragging towards the fixed object moved towards it, and dragging away from the fixed object moved away from it. This has been changed so that now, dragging towards the top or right moves towards the fixed object, and dragging towards the bottom or left moves away from the fixed object.
Other Improvements:
  • The Asteroid Apophis sample simulation has been added to the Solar System 2 sample simulations to illustrate the very close encounters of Asteroid Apophis with the Earth on 13th April 2029 and 13th April 2036, and to show how the asteroid's orbit is significantly changed by the influence of the Earth's gravity.
  • The evolution algorithm has been improved to reduce the dependency of results on the length of the time step when using long time steps in solar system simulations.
  • A bug has been fixed that caused a new simulation to be created with the old AstroGrav 2.1.2 evolution algorithm instead of with the current AstroGrav 2.2+ evolution algorithm.
  • When you close the last window on the Windows operating system, you are now presented with a small window giving you a choice of New, Open..., and Exit, instead of automatically exiting as in earlier versions.
  • A bug has been fixed that could cause unwanted multiple file dialogs to get displayed when a view window's tool palette was visible.
  • A bug has been fixed that allowed you to save a simulation with just units and notes windows visible, making it unusable on the Windows operating system because there was no menu bar visible.
  • The documentation and tutorial have been updated to cover the recent improvements.

Version 2.2.1:

Object Import Improvements:

  • Comet and asteroid import tables have had a menu of categories added that allows you to quickly pick out particular categories of comets and asteroids. The following categories are available for comets:
    • All Comets
    • Near-Earth Comets
    • Short Period Comets
    • Long Period more...
Requirements
Intel/PPC, OS X 10.5 or later



MacUpdate - AstroGrav



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AstroGrav User Discussion (Write a Review)
ver. 2.x:
Your rating: Now say why...
Overall:

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burypromote

+6
Planetary-Paul commented on 06 Aug 2012
Works cool on my UB MBP with Mountain Lion, except for one thing:
Gate Keeper has to be turned off to use it. The AG website says it's a bug in 10.8. Come on guys!
[Version 2.0]

1 Reply

burypromote
+1

+6
Planetary-Paul replied on 28 Dec 2012
V 2.0.2 update fixed it, Thanks!
burypromote
Planeten.paultje@mac.com-Guhy commented on 13 Sep 2005
Tried it on a Tiger 17" PB, but it runs that machine completely into the ground. My 20" G5 iMac (latest model, requires Tiger) did not fare too much better.

This may be the graphics problem under Tiger the author mentions. But everyone will end up with Tiger eventually, so if AstroGrav is going to be used on the Mac, its current problems will have to be tackled. I think its beta at the moment.

I hope the problems will be resolved because the program looks very promising for educational work.

So I won't rate it now but wait until I can use it.
[Version 1.2]

1 Reply

burypromote
Planeten.paultje@mac.com-Guhy replied on 23 Nov 2005
Still the same situation on my PB. Dead slow. Hopefully the next version brings salvation, I really want to use this app......
There are currently no troubleshooting comments. If you are experiencing a problem with this app, please post a comment.

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Downloads:8,698
Version Downloads:74
Type:Education : Science
License:Shareware
Date:19 Feb 2014
Platform:PPC 32 / Intel 64 / Intel 32 / OS X
Price: $79.00
Overall (Version 2.x):
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AstroGrav is a software program that allows you to study how astronomical objects move and interact under the force of gravity. It features superb interactive 3D graphics which allow you to move around within an astronomical system that you are viewing, 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 AstroGrav without having to go to the trouble of entering 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 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 Universal 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 Universal Gravitation, and displays the results as they are calculated so that you can watch the system evolve as in a movie. AstroGrav 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.


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