Aaron Golden offers the app for free Gravity Lab on Mac App Store. His offer was supposed to expire on February 1st, but apparently he forgot to lock in the price market.
If you are interested in how the objects move in a vacuum, this simple tool is perfect! You can even make your own planetary systems and give them a boost to see how they would move if they really did.
Aaron explains: “Gravity Lab is a Newtonian gravity simulator. Experiment with integrated engineering in planetary systems or create your own system from scratch.See what happens when you double the mass of the Sun or when you modify the gravity constant of the universe! ”
The application requires OS X 10.7 (Lion) and 64bit processor
Download Gravity Lab from here!
