Level 1-18 | Pig Bang Angry Birds Space Guide
Last update: 11 May 2016
Available birds: Ka-Boom; Ka-Boom; Ka-Boom; Ka-Boom
Number of launched birds: 1/4
Estimated score: 45000 (+3x 10000) = 75000+
Solution 1
The first solution is to push the circled asteroid by detonating the bird more or less at the indicated spot, so that the "stone" hits the other asteroid on its way, thus increasing the chances of destroying everything else.
Solution 2
You can also try to push the other asteroid - in a straight line of the same flight path - gaining three "attacking" asteroids if you do it in the illustrated way.
Solution 3
The last solution greatly increases your chances to exterminate the pigs completely, as there is a chance for up to 6 asteroids to fall on the planet.