What are you using distances for? THis doesn't manke sense. Do you mean they form there? Yeah... Some moons will be inside a large planet monmarfori, and our moon isn't 1,000 km away, it's 300,000 km away. Jupiter's moon Io; 421,700 km, Ganymede; 1,070,400; Mimas, 185,520; Enceladus, 237,948; Tethys, 294,619; Titan, 1,221,870; Triton, 354,759