How to get three stars on world 1 level 25 angry birds space
Another one of these levels where you can only use one bird to get those elusive three stars. Put some tension on your sling shot and release the bird in such a way that it flies directly towards the small space between the UFO and the gravitational field of the small planet. Just before it reaches the spot between them press down on your screen so it splits up into three. The middle bird will go straight ahead and push the big stone towards the big planet and the three pigs. The left one will need to hit the upper pig and the right one will have to weer right and take out the pig in the space craft.
A video guide of the whole thing if you need some more help.