Eris and Dysnomia
Simulates dwarf planet Eris and its moon Dysnomia in the scattered disc at about 68 AU. Dysnomia’s 37,000 km orbit is the clock used to measure Eris’s mass.
Solar System
Moons
Satellite systems from Earth–Moon and the Galilean moons to Saturn’s rings, Uranus on its side, retrograde Triton, and distant binaries such as Pluto–Charon, Eris–Dysnomia, and Makemake–MK2.
Jupiter and the Galilean Moons
Simulates Jupiter with Io, Europa, Ganymede, and Callisto — the Galilean moons in 4:2:1 resonance — as a giant-planet satellite system under Newtonian gravity.
Makemake and MK2
Simulates classical Kuiper Belt dwarf planet Makemake and its dark moon MK2 at ~21,000 km, both orbiting the Sun at roughly 45 AU beyond Neptune.
Mars and Its Moons Phobos and Deimos
Simulates Mars with Phobos and Deimos: Phobos 6,000 km up on a 7.7-hour inward spiral toward tidal breakup, Deimos at 23,460 km on a quieter 30-hour orbit.
Neptune and Its Moons
Simulates Neptune’s moons, dominated by retrograde Triton plus Proteus, Larissa, and highly eccentric Nereid — a captured Kuiper Belt satellite system.
Pluto and Its Moons
Simulates Pluto, Charon, Styx, Nix, Kerberos, and Hydra as a binary dwarf-planet system whose barycenter lies outside Pluto, with a 6.4-day mutual orbit.
Saturn and Its Moons
Simulates Saturn with Titan, Enceladus, Mimas, and its other major moons, plus thousands of gravitationally interacting ring particles from the D ring to the F ring.
Shoemaker-Levy 9 Impacts Jupiter
Simulates comet Shoemaker-Levy 9’s 21 fragments slamming into Jupiter in July 1994 at 60 km/s, with the Galilean moons and Sun in the same gravity field.
The Earth and Moon System
Simulates Earth and the Moon as a two-body system: the Moon at 384,400 km, tidally locked on a 27.3-day orbit, with the Sun included as the distant perturber.
Uranus and Its Moons
Simulates Uranus rolled on its side (98° tilt) with Miranda, Titania, Oberon, and the inner shepherd moons orbiting in that extreme equatorial plane.