Where's the Blur Nodes?

I’m trying to get a blur effect in Cycles Render. Yet I don’t have the filter option to add blurs.

What I’m trying to do is make a quick sun for this scene.

Before I go and add the three moons for the planet. So the light it emits bounces off them and hits the planet itself.

So where do I look? Or is a glow effect something that only can be done in Blender Render?

Blur is a composite node not a material node

Awesomesauce. Thanks ^_^.