This is Starship, the most powerful rocket ever built 0:42
(CNN) -- This Saturday, SpaceX will attempt the second launch of Starship, the most powerful launch vehicle ever built.
After months of rebuilding and complying with regulatory paperwork following the explosion of the first test flight of the Starship system in April, SpaceX is ready for its next launch.
The megarocket, the most powerful launch vehicle ever built, is expected to blast off this Saturday between 7:00 and 9:00 a.m. local time (8:00-10:00 a.m., Miami time), with the hope that human exploration of the Moon and Mars will depend on its success.
The Starship spacecraft stacked atop the Super Heavy rocket is destined to play a key role in NASA's Artemis III lunar mission, currently scheduled for 2025. The outcome of the launch attempt could have a major impact on the U.S. space agency's lunar exploration goals.
Where to watch the Starship rocket launch live?
SpaceX will livestream the launch from its facility in Boca Chica, Texas. CNN will also provide live updates.
Starship is still at a fairly early stage of the rocket development process. And it's unclear if the vehicle will hit all of its brands today, or even go further than April's test launch.
For his part, CEO Elon Musk likened the odds of success to a coin toss.
If all goes according to plan, it will look like this: Super Heavy will fire up its engines and soar over the Gulf of Mexico.
All systems and weather are go for the second integrated flight test of Starship. Today's webcast will go live ~35 minutes ahead of liftoff → https://t.co/bJFjLCiTbK https://t.co/NHKUwGYYkY
— SpaceX (@SpaceX) November 18, 2023
The booster will burn out its fuel in just a couple of minutes before pulling away from the Starship spacecraft.
Super Heavy will then be discarded in the ocean, though SpaceX will try to restart its engines on the way down to practice how the vehicle could one day land back on dry land so it can be reused on future missions.
Meanwhile, Starship will fire its own six engines and propel itself to faster and faster speeds, aiming to enter Earth's orbit. From there, the mission is to complete nearly a full lap around the world and splash down off the coast of Hawaii in the Pacific Ocean.
If all goes according to plan, the mission should last about an hour and a half from start to finish.
Starship's Last Test Launch Ended Explosively
SpaceX first attempted to launch Starship and its Super Heavy booster in April.
But the test flight didn't get very far.
It immediately became clear that not all of the Super Heavy's engines were on and the rocket took off in an almost horizontal direction.
Then, as it began to soar over the Gulf of Mexico, the rocket began to spin over its head and SpaceX was forced to press the self-destruct button, blowing up the rocket so that it posed no danger.
The sheer force of the rocket during liftoff also left the launch pad in tatters, forcing SpaceX to rebuild the pad in a way it hopes will better withstand the fierce blow of the Super Heavy's 33 engines.
Despite the mishap, SpaceX tried to frame the mission as a crucial learning experience. The company has long been known to make explosive mistakes during rocket development, aiming to learn more quickly than if it relied solely on ground testing.
CNN's Jackie Wattles contributed to this report