Galaxy Slingshot direct-summation N-body

status	idle
sim time t	0.00
bodies (alive)	–
physics	–
sim speed	–
render	–

Space start/pause · L launch · F follow · R reset view · drag to orbit, wheel to zoom

Simulation

Time step Δt leapfrog Sim speed2.0×

Speed = simulation time units per real second. If the CPU cannot keep up, the run is throttled and marked CPU-limited.

Stars N O(N²) Black-hole mass × M_stars Softening ε Plummer Seed

Spaceship

Radius R Azimuth φ Height z Aim angle Pitch Speed Ship mass

Aim angle 0° = prograde (along the local rotation), −90° = straight at the black hole. Speed is in units of the local circular speed v_c(R); √2 v_c is the escape speed of a point mass.

Camera follows the ship Show aim preview (test particle in the frozen field)

Score 0 / 0 shots

Display

Quality Star size1.00 Brightness1.00 Ship trail Polar grid Auto-rotate camera

Conservationsince last baseline

ΔE / |E₀|–

|ΔP| / Σm|v|–

|ΔL| / |L₀|–

E = K + U with Plummer-softened U. Symmetric pair forces ⇒ P, L conserved to round-off; ΔE ∝ Δt² (leapfrog).