Red Planet 5-18 is the 18th level in Red Planet.
It's hard to plan your attack.
Launch Ice Bird south, aiming for the two pigs on the first planet. Then launch Blue Bird on a north of the same planet and split just as it enters the VERY top of the gravity field pushing the fiery asteroid down into the satellite.
Launch Ice bird in the same was as the first strategy, but the Blue birds are fired into the planetoid above the fiery asteroid. It is not incredibly easy to replicate, but the Blue birds can knock the fiery asteroid downward, with the volcano pushing it into the heart of the structure.
Third Rover is here! It's on the west of the top planet. Use any bird to claim it.