GJ 367 - System
Simulates GJ 367 b, an iron-rich world on an ultra-short orbit. A year lasts about eight hours, and the high density points to an exposed iron core. The density is higher than Earth's.
All Scenarios
Browse every interactive 3D gravity simulation — from NASA exoplanet systems and JPL Horizons Solar System models to n-body choreographies, spacecraft trajectories, and hypothetical what-if experiments. All run on Newtonian n-body physics.
GJ 3779 - System
Simulates GJ 3779, a cool M-dwarf of 0.27 solar masses, and GJ 3779 b, a 8.0-Earth-mass planet, with an orbital period of 3.0 days, at 0.026 AU from its star, on an eccentric orbit (e ≈ 0.07).
GJ 3929 - System
Simulates GJ 3929, a cool M-dwarf of 0.31 solar masses, and GJ 3929 b, a 1.8-Earth-mass planet, with an orbital period of 2.6 days, at 0.025 AU from its star, and an equilibrium temperature near 568 K.
GJ 393 - System
Simulates GJ 393, a cool M-dwarf of 0.43 solar masses, and GJ 393 b, a 1.7-Earth-mass planet, with an orbital period of 7.0 days, at 0.054 AU from its star, and an equilibrium temperature near 485 K.
GJ 3942 - System
Simulates GJ 3942, a cool M-dwarf of 0.63 solar masses, and GJ 3942 b, a 7.1-Earth-mass planet, with an orbital period of 6.9 days, at 0.061 AU from its star, and an equilibrium temperature near 590 K, on an eccentric.
GJ 3988 - System
Simulates GJ 3988, a cool M-dwarf of 0.18 solar masses, and GJ 3988 b, a 3.7-Earth-mass planet, with an orbital period of 6.9 days, at 0.041 AU from its star, and an equilibrium temperature near 348 K.
GJ 3998 - System
Simulates GJ 3998, an orange K-type dwarf of 0.52 solar masses, and GJ 3998 b, a 2.5-Earth-mass planet, with an orbital period of 2.7 days, at 0.030 AU from its star.
GJ 411 - System
Simulates GJ 411, an orange K-type dwarf of 0.39 solar masses, and GJ 411 b, a 2.7-Earth-mass planet, with an orbital period of 12.9 days, at 0.079 AU from its star, on an eccentric orbit (e ≈ 0.06).
GJ 414 A - System
Simulates GJ 414 A, an orange K-type dwarf of 0.65 solar masses, and GJ 414 A b, a 7.6-Earth-mass planet, with an orbital period of 50.8 days, at 0.232 AU from its star, and an equilibrium temperature near 309 K.
GJ 422 - System
Simulates GJ 422, a cool M-dwarf of 0.35 solar masses, and GJ 422 b, a 11.1-Earth-mass planet, with an orbital period of 20.1 days, at 0.111 AU from its star, on an eccentric orbit (e ≈ 0.11).
GJ 4274 - System
Simulates GJ 4274, a cool M-dwarf of 0.18 solar masses, and GJ 4274 b, a 3.0-Earth-mass planet, with an orbital period of 1.6 days, at 0.015 AU from its star.
GJ 4276 - System
Simulates GJ 4276, a cool M-dwarf of 0.41 solar masses, and GJ 4276 b, a 0.05-Jupiter-mass companion, with an orbital period of 13.4 days, at 0.082 AU from its star, on an eccentric orbit (e ≈ 0.37).
GJ 433 - System
Simulates GJ 433, a cool M-dwarf of 0.48 solar masses, and GJ 433 b, a 6.0-Earth-mass planet, with an orbital period of 7.4 days, at 0.062 AU from its star.
GJ 436 - System
Simulates GJ 436 b, an eccentric hot Neptune trailing a huge comet-like helium and hydrogen tail. The oval orbit has persisted despite strong tides. The tail extends millions of kilometers behind the planet.
GJ 463 - System
Simulates GJ 463, a cool M-dwarf of 0.49 solar masses, and GJ 463 b, a 1.65-Jupiter-mass companion, with an orbital period of 9.47 years, at 3.530 AU from its star, on an eccentric orbit (e ≈ 0.15).
GJ 480 - System
Simulates GJ 480, a cool M-dwarf of 0.45 solar masses, and GJ 480 b, a 8.8-Earth-mass planet, with an orbital period of 9.6 days, at 0.068 AU from its star, and an equilibrium temperature near 406 K.
GJ 486 - System
Simulates GJ 486 b, a hot rocky planet around a nearby red dwarf. JWST watches its dayside glow to see whether any atmosphere survives. Emission spectra test whether any air remains at all.
GJ 504 - System
Simulates GJ 504 b, a cold giant planet imaged far from a Sun-like star. It is pinkish in infrared and one of the least massive planets seen directly.