Launch your first laser bird shot from top of the planet. You should aim to take out the satellite while having the lasers bounce inside. The more pigs that you can end up killing the better.
Power Activation Point
Shoot out the lasers when you can get a clear shot of the satellite.
First Shot Result
The lasers bounce around inside the little metal cave. It should take out a few pigs to make your next shot easier.
Launch your next shot into the bottom right small planet. Make sure that the bird enter from the top. You must kill all the pigs with this shot.
Second Power Activation Point
Activate some time before or when you enter the atmosphere of the small planet.
Second Shot Result
All of your splits take out the rest of the pigs, you then get the three star mastery for the stage.