Pig Bang 1-15

Pig Bang 1-15 is the 15th level of Pig Bang. 

New things
Asteroids are introduced.

Difficulty
This level is quite hard for some to achieve the target score.

Strategy
One strategy for Pig Bang level 1-15 is to target a trio of small asteroids between the two left pigs. Send a Black Bird into the larger asteroid in their left to pop the leftmost pig. The explosion should pop the other two bubbles, killing the other two pigs.

Walkthrough
http://www.angrybirdsnest.com/angry-birds-space-pig-bang-level-1-15-walkthrough/