推荐理由：《GravitySim》是一款适用于苹果系统的教育类软件APP。GravitySim is a simulation of Newtonian gravity.《GravitySim》大小4.9MB，在本站深受5271位玩家喜爱和下载。要找等，赶紧下载到手机吧。
It allows the user to input the parameters of several bodies in a universe and the simulation uses those parameters to update the positions of the bodies in space based on their gravitational interactions with other bodies in the universe.
GravitySim employs the Barnes-Hut algorithm for calculating the gravitational interactions between bodies in the universe.
The algorithm allows the user to smoothly tune the simulation for accuracy (more computationally expensive) or speed (good for when there are many bodies but sacrifices accuracy).
With GravitySim you can
. Create and investigate a wide variety astronomical situations and view gravitational effects of heavenly bodies on each other over time.
. Enter exact masses, dimensions, speeds and positions in ③-dimensions of bodies using real world values.
. Track individual bodies in a planetary system you have created.
. Put planetary rings around your planets.
. Rotate the scene in ③-dimensions, as well as zoom in and out so you can view the action from and infinite number of perspectives.
. Use lighting effects to see the phases of the moon or any other body in orbit around of a star or light emitting body
. Store up to ②⓪ different situations for later investigation.
. Simply enjoy the view of our solar system from the built-in default preset.
