Type Supernova in the Composition Name field.
Choose HDTV 1080 29.97 from the Preset pop-up menu.
Set the Duration to 10:00.Creating a particle system
You will build the particle system from a solid layer, so you’ll create that next.
1. Choose Layer > New > Solid to create a new solid layer.
2. In the Solid Settings dialog box, type Particles in the Name box.
3. Click Make Comp Size to make the layer the same size as the composition. Then click OK.