Gravilux is an interactive musical starfield visualizer: it's a combination of music, animation, art, and science. As you touch the screen, gravity draws simulated stars to your fingertips. You can tease and twist the particles into galaxies, or explode them like a supernova. You can color the stars by their speed, and make them dance to the music from your playlist. You can change parameters including gravity and number of stars, and enable anti gravity and color. Multiple fingers and multiple people can touch the screen at once, collaborating or competing.