After printing and painting the rocket and crater, use a bit of wire to hold the rocket over your tea light at the right height (see picture). The rocket's back side pod is hollow to help with drilling a small hole to insert the wire.

Blender file included.

rocket.stl does not need supports, crater.stl will need supports for the cavity holding the electric tea light.

Tea Light size: 38mm diameter, 20mm height (not counting the flame)

The Tealight Series:

UFO

Flyer

Blast Off 2! The new Version