Golden Rover #1 (E-R1) is located on level 5-3 of Angry Birds Space Red Planet. Zoom out and you will see the Rover on the extreme right of the level. Waste Terence then use the Lazer bird to reach the Rover. Once you hit the egg you’ll immediately be transported via a wormhole to the level, which pays homage to the Viking Rover. One strategy 3-starring this level is to fire the Ice bird toward the southern geyser to freeze the northern structure. Then blast the southern structure with the Black bird to fling debris all over the place, clearing the level.
If you need help, the video below shows the location of the Golden Rover and a strategy for passing the level with 3 stars.