Ice cakes with thin layer of buttercream icing. Roll out blue, orange and grey fondant and cover cakes. Create texture in grey moon by pressing various size ball tools into fondant. Press lines and dots into orange Mars. Use red and brown airbrush color to make Mars look more realistic and natural. Roll out green fondant and cut out continents. (Place map over fondant and cut along maps continent outlines if you desire realistic looking continents.) Attach green fondant continents with piping gel.
Use parchment cones with small holes in the tips to pipe candy coating details in rocket and astronaut. Fill remainder of cavity with white candy coating. Allow to completely set, remove from mold and press into top of cakes.