Galaxy Crash
Menubar Background Applet Controls Physics of the Applet Lab Links
     

Applet Controls Explained

- starts or continues the simulation.
- pauses the simulation.
- initializes the simulation.

To Rotate along the x and y axes:

click and drag inside the viewport.
To Zoom (or Rotate about the z-axis):
hold the Shift key and drag inside the viewport.

Green Centered
centers the view in on the green (main) galaxy, allowing the viewport to move with it.
Friction
turns on dynamical friction, calculated using a Chandrasekhar-like analytic implementation. This option will allow galaxies to merge.
Big Halos
makes the (unseen) dark matter halos four times bigger and more massive

You can change:

  • Peri: the distance of closes approach [in kiloparsecs].
  • Red Galaxy mass: the mass of the Red (companion) galaxy [in terms of the Green (main) galaxy's mass, ie 1=equal mass].
  • Galaxy theta, Galaxy phi: the inclination and slew of the primary galaxy in the orbital plane [in degrees].
  • Companion theta, Companion phi: the inclination and slew of the companion galaxy in the orbital plane [in degrees].
  • Number of Stars: the total number of stars in the simulation, divided evenly between galaxies. The smaller the number, the faster this applet will run; the bigger the number, the cooler the simulation. That's life...