Goodbye Aaron Jones!
Hello Rccdecca!
PAricle simulation (view follows one particle to keep the bubble on the screen)

Properties:
• Force attract based on distance
• Acceleration based on Force and mass (F=ma)
• Velocity based on Acceleration (V = v + at)
• Position based on velocity and time step (S = s + Vt + 1/2 at^2)

You can adjust the power of the attraction in the text box, then hit enter. Values < 1 give low attraction, while values > 2 yield implosion divergence. Try the range [.7, 1.9].