Pig Bang 1-18/Space Eagle

Here is the strategy for 100% total destruction with Space Eagle for Pig Bang 1-18 (Angry Birds Space). Note: You must have least one sardine can to play this mode.

Difficulty

 * This may take a while to think out of a strategy.
 * The key here is to destroy both structures and there is a perfect space between them. So send the sardine there for massive destruction.

Strategy
Fire the Sardine can into the bottom of the first small asteroid (just northeast of the first large asteroid). The can will deflect to land next to the two ice structures, and the Space Eagle will blow them to smithereens.