The platform in the right planet is very annoying.
Anchors in the right planet is very annoying too.
Fire the Sardine Can south around the first planet, outside of the water but within the gravitational field. The goal is to have the Can avoid the swinging anchor north of the target planet, unleash the Space Eagle when the can settles between the third and fourth towers.
Note: This shot is not easy because of the platform and the anchors.