SpaceX said it has learned a great deal from the previous two attempts, both of which ended in explosions

The vehicle, collectively called Starship, comprised the Super Heavy booster and a spacecraft that sits on top. It is designed to be fully reusable, landing back at its launch site. NASA is investing about $4 billion into the system and intends to use it for the first human landings on the moon since the Apollo era.

In a statement, SpaceX said that the 110-minute launch window would open at 8 a.m. Eastern and that its webcast would go live about 30 minutes before.

On Starship’s last flight, upgrades to the launchpad, including a water suppression system, allowed it to survive the violence of takeoff, when all of the rocket’s 33 first-stage engines successfully ignited. The vehicle made it through stage separation, and the upper-stage engines fired as well. But as the booster started to ignite 13 of its engines to fly the rocket back to Earth, one engine failed, “quickly cascading to a rapid unscheduled disassembly,” the phrase SpaceX uses to describe a loss of vehicle. The spacecraft was lost after a leak led to a fire and its autonomous onboard flight termination system destroyed the vehicle.

After the flight, the FAA oversaw SpaceX’s investigation and said in February that it had accepted the company’s report. As a result, the FAA required SpaceX to complete 17 corrective actions, including hardware redesigns, updates to engine-control algorithms and the installation of fire protection measures.

SpaceX said that “upgrades derived from the flight test will debut on the next Starship and Super Heavy vehicles.” It added in a subsequent statement that “each of these flight tests continue to be just that: a test. They aren’t occurring in a lab or on a test stand but are putting flight hardware in a flight environment to maximize learning.”