The Figure Eight N-body Choreography
Simulates the Chenciner–Montgomery figure-eight: three equal masses tracing one closed curve, each offset by a third of a period, repeating forever under Newtonian gravity.
All Scenarios
3D Space and Gravity Simulator. Simulate the solar system, exoplanets and even colliding galaxies. Add, delete and modify planets, and change the laws of physics.
Red Dwarf Flyby of the Solar System
Simulates a 0.12-solar-mass red dwarf on a hyperbolic flyby 40 AU from the Sun, with all eight planets and major dwarf planets in their January 2025 configuration.
The Kuiper Belt and Scattered Disc
Simulates the outer Solar System beyond Neptune: Pluto, Eris, Haumea, Makemake, Sedna and other Kuiper Belt and scattered-disc bodies on their eccentric, inclined orbits.
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.
11 Com - System
Simulates 11 Com, a Sun-like G-type star of 2.09 solar masses, and 11 Com b, a 15.5-Jupiter-mass companion, with an orbital period of 323 days, at 1.178 AU from its star, on an eccentric orbit (e ≈ 0.24).
11 UMi - System
Simulates 11 UMi, an orange K-type dwarf of 2.78 solar masses, and 11 UMi b, a 14.7-Jupiter-mass companion, with an orbital period of 1.41 years, at 1.530 AU from its star, on an eccentric orbit (e ≈ 0.08).
14 And - System
Simulates 14 And, an orange K-type dwarf of 1.78 solar masses, and 14 And b, a 3.56-Jupiter-mass companion, with an orbital period of 187 days, at 0.775 AU from its star.
14 Her - System
Simulates 14 Her, an orange K-type dwarf of 0.97 solar masses, and 14 Her b, a 8.90-Jupiter-mass companion, at 2.839 AU from its star, on an eccentric orbit (e ≈ 0.37).
16 Cyg B - System
Simulates 16 Cygni B b, a giant with eccentricity near 0.7. The distant stellar companion 16 Cygni A is the usual suspect for pumping that extreme orbit.
17 Sco - System
Simulates 17 Sco, an orange K-type dwarf of 1.22 solar masses, and 17 Sco b, a 4.32-Jupiter-mass companion, with an orbital period of 1.58 years, at 1.450 AU from its star, on an eccentric orbit (e ≈ 0.06).
18 Del - System
Simulates 18 Del, a Sun-like G-type star of 2.10 solar masses, and 18 Del b, a 9.21-Jupiter-mass companion, with an orbital period of 2.69 years, at 2.476 AU from its star.
1RXS J160929.1-210524 - System
Simulates 1RXS J160929.1-210524, an orange K-type dwarf of 0.85 solar masses, and 1RXS J160929.1-210524 b, a 8.00-Jupiter-mass companion, at 330 AU from its star, and an equilibrium temperature near 1,700 K.
24 Boo - System
Simulates 24 Boo, a Sun-like G-type star of 1.05 solar masses, and 24 Boo b, a 0.88-Jupiter-mass companion, with an orbital period of 30.3 days, at 0.194 AU from its star.
24 Sex - System
Simulates 24 Sex, an orange K-type dwarf of 1.54 solar masses, and 24 Sex b, a 1.99-Jupiter-mass companion, with an orbital period of 1.24 years, at 1.333 AU from its star, on an eccentric orbit (e ≈ 0.09).
2MASS J01033563-5515561 A - System
Simulates 2MASS J01033563-5515561 A, a cool M-dwarf of 0.19 solar masses, and 2MASS J01033563-5515561 AB b, a 13.0-Jupiter-mass companion, at 84.0 AU from its star.
2MASS J01225093-2439505 - System
Simulates 2MASS J01225093-2439505, a cool M-dwarf of 0.40 solar masses, and 2MASS J01225093-2439505 b, a 24.5-Jupiter-mass companion, at 52.0 AU from its star.
2MASS J02192210-3925225 - System
Simulates 2MASS J02192210-3925225, a cool M-dwarf of 0.11 solar masses, and 2MASS J02192210-3925225 b, a 13.9-Jupiter-mass companion, at 156 AU from its star.
2MASS J0249-0557 A - System
Simulates 2MASS J0249-0557 A, a cool M-dwarf of 0.05 solar masses, and 2MASS J0249-0557 c, a 11.4-Jupiter-mass companion, and an equilibrium temperature near 1,723 K.