This is a simple program designed to graphically portray how disk galaxies can transform themselves through collisions. The two disks are set up with up to 3000 test 'particles' in Keplerian orbits around two centrally-dominated masses -- approximately at the sophistication of the landmark Toomre and Toomre papers of the 1970's.
The goal of the program is to facilitate curiousity and tinkering, as well as providing an impressive real-time movie of the galactic interactions.
Famous twisted galaxies like M51 and NGC 4038/9 can be nicely modeled using this program. Matter bridges, tidal tails, and ring galaxies can all be neatly demonstrated in real time.
An «old timer», dating back to 1997.
The title links to the Linux X86 installation file. Solaris and Windows versions are also available.
