Golden Eggsteroid 2 is located on Level 1-20 of Angry Birds Space. The Golden Eggsteroid is hidden in the tall brush atop the planet. Fire a Lazer Bird above it, then redirect him into the Eggsteroid. Once you hit the egg, you’ll immediately be transported via a wormhole to the level.
The pig can be tricky to pop.
Fire the Red Bird as high as you can at the stone brick floating at the top, so the pig pops off and Red Bird does not easily disintegrate. A pig should fall down, only to get popped by the Red Bird, which should have fallen down onto the ground "floor" below.