Gravity Simulator... to play-with/learn-from

This is such a fun interactive put together by the NSTMF. The video shows my own home-made universe, where I have just whiled away the last hour building planets, bending space -time and flinging astronomical objects at each other for the simple pleasure of watching them smash each other up - or occasionally falling into orbit around each other.

I think I might even have learned something in the process.

Click here to create your own: NSTMF Gravity

I haven't come across them before, but apparently the NSTMF is the (US) Nation Science and Technology Medals Foundation, who tell us that their mission is to build inclusive STEM communities. About NSTMF - National Science and Technology Medals Foundation

They have another fun app on acoustics too: NSTMF Sound