The primary objectives for Sunday's test, Starship's fifth, will be attempting "the first ever return to launch site and catch of the Super Heavy booster, and another Starship reentry and landing burn, aiming for an on-target splashdown of Starship in the Indian Ocean," SpaceX said in a statement. Teams will be monitoring to ensure "thousands" of criteria are met both on the vehicle and at the tower before any attempt to return the Super Heavy booster to the tower and "catch" it. - 'Fail fast, learn fast' -The large mechanical arms, called "chopsticks" and even "Mechazilla" by Musk, have generated considerable excitement among space enthusiasts. Starship stands 397 feet (121 meters) tall with both stages combined -- about 90 feet taller than the Statue of Liberty. Its Super Heavy booster, which is 233 feet tall, produces 16.7 million pounds (74.3 Meganewtons) of thrust, about twice as powerful as the Saturn V rockets used during the Apollo missions.