How to get three stars in angry birds space world 2 level 29
Shoot the first bomb bird in such an angle as can be seen in the screenshot above. Once it is next to the planet press your screen so it goes of, taking out the pigs and push the crate of TNT towards the other planets. The crate will need to go of and take out the upper pigs. If it does not reload the level and give it another try. Once you get it right shoot the second bird as marked with the number 2 in the screenshot. You can now decorate your phone with another three golden stars.
A video guide of the level 2-29 can be seen below.