I am building a model for an atom. I want to show the atom of a hydrogen in which electron is revolving around the nucleus. as electron revolves it leaves its short trail which dies by fading.

Here what i have done till now.

Created a nurbs circle > created a particle emitter > animation of the emitter along the nurbs circle.

:headbang:

Guys please help me in making a trail of the revolving electron which dies before the electron passes through the same point again. I want my electron to be a sphere, Glowing, fading trail, along the arc of the orbit. I dont want tangential fading tail.

I will highly appreciate your help.

Thanks