The Daily - Birds in Space

The Daily - Birds in Space was a guide for Angry Birds Space which was released on March 14, 2012. It was removed at some point after the game released.

History
On March 14, 2012, The Daily uploaded a free app that acts as an official companion to Angry Birds Space. The guide contains detailed information on the creation of the game, new characters, and other information.

Story Details for Angry Birds Space
From The Daily - Birds in Space guide, a rough overview of the story was revealed:

One day, the birds were taking care of the eggs when a mechanical claw grabs the Birds' eggs and they follow it through a wormhole to arrive in the world of Space. There, some gain new powers or equipment. They meet Ice Bird, convinced he can help them get home, but Ice Bird is only concerned about saving his world from the Space Pigs and retrieving the Eggsteroid.

Space Pigs are the Bad Piggies, outfitted with new equipment allowing them to survive in Space and brandishing new challenges to the Flock, including the Space King's UFO (which houses the aforementioned claw) and the enormous Fat Pig.