Some extra help

Calculate for each body in the system and every other body:

• distance square = (x distance between itself and the other body)^2 + (y distance between itself and the other body)^2
• force = G * its mass * the other’s mass / distance^2
• forceX = force * (the other’s x position – its x position )/ distance
• forceY = force * (the other’s y position – its y position )/ distance
• accelerationX = forceX / its mass
• accelerationY = forceY / its mass
• velocityX += deltaT * accelerationX
• velocityY += deltaT * accelerationY

update the new position for the body

• x position += deltaT * velocityX
• y position += deltaT * velocityY