make particles move in world space

Whats the best way to create a particle system that leaves a (brazier) line of particles, for like creating the milky way arms.

When the PS starts emitting, and i give a spin to the PS, the particles should just stay in world space, and not act like a child of the emitter.

Is there a way to do it? and if so, it should run smooth on mobile platforms.

Thanks for your time guys!

There is an option to enable it. I don’t think it has any major performance difference.

http://docs.unity3d.com/Documentation/ScriptReference/ParticleEmitter-useWorldSpace.html