Golden Eggsteroid #7 is located on level 4-16 of Angry Birds Space Utopia. The Golden Eggsteroid is hidden in the bushes directly underneath the slingshot. Burn the blue bird then fire the lazer bird backwards to get it. Once you hit the egg you’ll immediately be transported via a wormhole to the level, which pays homage to the 1960’s board game Kimble. One strategy for 3-starring this level is to fire the red bird at the bottom TNT while popping the top pig closest to the slingshot in the process. If needed, fling the next red bird around the top hitting the lollipos while taking out the bottom pig so the tower of pigs smashes into the planet.
If you need help, the video below shows the location of the Golden Eggsteroid a strategy for passing the level with 3 stars.