BOCA CHICA, Texas (Reuters) - The SpaceX Starship, a futuristic craft designed to eventually send astronauts to the moon and beyond, roared into the sky from Texas on Thursday, a third test launch for Elon Musk's company that has carried it farther than two previous flights that ended with explosions.
The two-stage rocketship, taller than the Statue of Liberty, blasted off from the company's Starbase launch site near Boca Chica on the Gulf Coast of Texas near Brownsville, on an uncrewed flight to space. It executed a key stage-separation maneuver nearly three minutes later, 44 miles (72 km) in altitude.
The test mission, lasting far longer than previous attempts last year, marked only the third attempt to fly Starship mounted atop its towering Super Heavy rocket booster. Both were designed and built by SpaceX, the rocket and satellite company founded in 2002 by billionaire entrepreneur Musk.
The Starship was coasting in space 15 minutes after lifting off and is expected to begin its atmospheric reentry roughly 50 minutes into the mission.
A live SpaceX webcast of the liftoff had shown the rocketship rising from the launch tower into the morning sky as the Super Heavy's cluster of powerful Raptor engines thundered to life in a ball of flame and billowing clouds of exhaust and water vapor.
The launch came less than 24 hours after federal regulators granted SpaceX a launch license for the test.
Unlike the first two test flights last year, aimed mainly at demonstrating that the spacecraft's two stages can separate after launch, plans for Thursday's test called for an attempt to open Starship's payload door and reignite one of its engines in space.
Each of the previous flights was routed toward a planned crash landing near the Hawaiian islands in the Pacific, while the latest flight was targeting a splashdown zone in the Indian Ocean.
Even if it achieves more of its test objectives than before, SpaceX acknowledged a high probability that Starship's latest flight would end up like the first two, with the vehicle blowing itself to bits before its intended trajectory is complete.
Regardless of how well it performed on Thursday, all indications are that Starship remains a considerable distance from becoming fully operational.
Musk, SpaceX's billionaire founder and CEO, has said the rocket should fly hundreds of uncrewed missions before carrying its first humans. And several other ambitious milestones overseen by NASA are needed before the craft can execute a moon landing with American astronauts.
Still, Musk is counting on Starship to fulfill his goal of producing a large, multipurpose next-generation spacecraft capable of sending people and cargo to the moon later this decade, and ultimately flying to Mars.
Closer to home, Musk also sees Starship as eventually replacing the SpaceX Falcon 9 rocket as the workhorse in the company's commercial launch business that already lofts most of the world's satellites and other payloads to low-Earth orbit.
For Thursday, SpaceX was aiming to at least exceed Starship's performance with its Super Heavy booster during their inaugural test launch together last April, when the spacecraft exploded over the Gulf less than four minutes into a planned 90-minute flight.
That flight went awry from the start. Some of the Super Heavy's 33 Raptor engines malfunctioned on ascent, and the lower-stage rocket failed to separate as designed from the upper-stage Starship, leading to the termination of the flight.
The second test flight in November made it farther than the first and managed to properly achieve stage separation, but the spacecraft exploded about eight minutes after launch.
SpaceX's engineering culture, considered more risk-tolerant than many of the aerospace industry's more established players, is built on a flight-testing strategy that pushes spacecraft to the point of failure, and then fine-tunes improvements through frequent repetition.
NASA, SpaceX's biggest customer, has a lot riding on the success of Starship, which the U.S. space agency is giving a central role in its Artemis program, successor to the Apollo missions that put astronauts on the moon for the first time more than 50 years ago.
While NASA Administrator Chief Bill Nelson has embraced Musk's frequent flight-testing approach, agency officials in recent months have made clear their desire to see greater progress with Starship's development as the U.S. races with China to the lunar surface.