Hey, doing book research and your gravity simulator came up. I'm a little confused with the whole system, since if it is put in too fast of a speed in a full system it ejects earth a little more than half a light year outside the system after less than 300 years. The same simulation done slower has a much greater stability, with only a few shots at random galaxies by Jupiter's moons.

Tony,
 
I've (finally) downloaded GravitySimulator and would like to try to use it to develop some spacecraft trajectories. One of the orbitsimulator web site's pages describes a simulation with accelerating particles. Unfortunately, its link to the configuration file gets a "page not found" error.  
The Web page is http://www.orbitsimulator.com/gravity/articles/spiral.html
The broken link is http://www.orbitsimulator.com/gravity/articles/sprial.gsim
 
Is there a typo in the url or is the file actually missing?
 
Thanks for whatever help you can provide.

Hi group,
 
i'm Astrella from Germany. If we have clear skies i like viewing the sky through my Meade LX200 12" in my backyard observatory.
 
Yesterday i got a question, how our solar system will behave, if one of this planets would vanish.
Well, i found Tony and his fine program. But i had no fun with the program. The program could be startet only once. The second time i got only a black background and it could not be closed the normal way by clicking the close button.
 
So i registered here and found the beta thread. I downloaded feb version 2009 and its an amazing peace of software Tony created.
 
Thanks Tony, i already could show a friend what happens when e.g. Jupiter would be removed from our solar system.

Quote from Astrella on 08/11/09 at 10:29:18:

 
Hi Astrella.  Welcome!
I regularly use LX200s.  I have access to my university's observatory which is a 10 minute walk from my house.  We have 2 LX200 12" and an LX200 16".  But skies here are usually overcast, and light pollution is a big problem.  It was cloudy last night, so I missed the Saturn ring plane crossing.
 
As you found out, Gravity Simulator 2.0 doesn't work well with European versions of Windows.  That's because they store numbers using commas instead of periods for decimals.  But the Beta version solves this problem.  Any time you perform an experiment, post the results here!

Hi Sparky.
Welcome to the forum.  Glad you like the software.
 
Try the scroll bar on the right of the screen to change viewing angles.

Hello everyone,  

Hi all, just registered