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Scientific American

Former deputy surgeon general Erica Schwartz nominated as new CDC chief NASA Artemis II astronauts say thank you to the world Congress grills RFK, Jr., about vaccines and cuts to health budget How the Grand Canyon formed is a surprisingly messy story. Here's the latest clue How far from humanity were the astronauts of Artemis II? The answer will surprise you Effect of antiamyloid Alzheimer’s drugs ‘absent or trivial,’ Cochrane review finds The Trump administration is looking to experts to weigh in on peptides When a naked mole rat queen dies, that usually means war—but not for this colony NASA needs nuclear power for its moon base. Here’s the White House plan to get it Why do older people have fewer seasonal allergies? 250-million-year-old fossil proves mammal ancestors laid eggs A face-swapping illusion can unlock childhood memories 30 years of Pokémon—how the Japanese franchise mirrors real-world science Sperm whales may make their own vowel sounds, similar to human language Colombia will euthanize Pablo Escobar’s invasive ‘cocaine hippos’ NASA’s Artemis III will pit SpaceX against Blue Origin The East Coast could see blazing hot temperatures this week. Here’s why Scientists just discovered 5.6 million bees under a New York State cemetery The real science of Pokémon How chemists engineer the signature smells of luxury perfumes How two mathematicians solved a cryptography mystery The engineering marvels hidden inside six-figure watches Expensive versus affordable binoculars—what’s the difference? How physicists found a new type of magnet hiding in plain sight A hot pair of supplements, creatine and methylene blue dye, may not work together Unlikely paths to discovery The baffling ecological disaster that's killing America’s freshwater mussels Poem: ‘How I Became a Spitfire Pilot during My Cataract Operation’ DARPA built an AI to fact-check enemy weapons claims Mathematicians created an ‘impossible’ shape that shouldn’t exist How cosmic rays are helping mining companies find critical minerals underground New evidence links heart disease to inflammation—and drugs can stop it An asteroid extinguished all the dinosaurs except for birds. Here’s why Math Puzzle: A disassembly job May 2026: Science History from 50, 100 and 150 Years Ago Readers respond to the January 2026 issue How to build a space hotel The humble ham sandwich inspired a math theorem for sharing food fairly Imperiled ‘cloud jaguar’ spotted in Honduran mountains for the first time in a decade Person functionally cured of HIV after bone marrow transplant from sibling Dream Chaser space plane faces uncertain future in NASA’s push for the moon Bizarre ‘compleximers’ break the rules of both glass and plastic This method to reverse cellular aging is about to be tested in humans The Artemis II mission worked—but should we really keep returning to the moon? How DNA forensics is transforming studies of ancient manuscripts Beetle larvae mimic flower scents to attract bee hosts See NASA’s Artemis II mission around the moon in 12 stunning photos New study shows how the brain weighs evidence to make decisions What NASA’s Artemis II tells us about the ‘overview effect,’ moon joy and awe New metal with triple copper’s heat conduction challenges fundamental physics NASA’s Artemis II reveals why humans still love the moon NASA’s Artemis II moon mission splashes down The Expanse authors James S. A. 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Scientists question CIA’s claim of long-range heartbeat detection How well GLP-1 weight loss drugs work may depend on your genetics NASA’s Artemis moon missions are a game changer for astronomy Tracking Artemis II—after its historic lunar flyby, NASA’s moon mission heads home NASA’s Artemis program has sparked a race to land U.S. rovers on the moon Do people see robots as having race? New studies clash as humanoids enter the real world Health experts warn of rising measles cases in undervaccinated communities In a first, Artemis II moon mission astronauts make ‘ship to ship’ call to ISS The mathematically correct way to slice a pizza See NASA’s Artemis II mission’s first incredible photos of the moon, Earth and a total solar eclipse In an echo of Apollo 8, NASA’s Artemis II astronauts witness stunning ‘Earthrise’ and ‘Earthset’ NASA’s Artemis II astronauts celebrate epic lunar flyby with stunning new images NASA’s Artemis era may finally solve three major moon mysteries NASA’s Artemis II ‘free return’ trajectory lets gravity do the driving Trump speaks with NASA's Artemis II astronauts after historic moon flyby NASA’s Artemis II crew experience total solar eclipse from space NASA’s Artemis II moon mission reaches greatest distance from Earth NASA’s Artemis II astronauts break Apollo’s distance record Watch live—NASA’s Artemis II’s moon flyby is underway Bypass the Strait of Hormuz with nuclear explosives? The U.S. studied that option in the 1960s NASA’s Artemis II mission is about to pass behind the moon NASA’s Artemis II, endangered species and oil, low western U.S. snowpack Where is Artemis II? NASA astronauts near the moon for first time in more than 50 years NASA’s Artemis II laser communications system is beaming 4K video from the moon NASA’s Artemis II moon mission is gearing up for its lunar flyby What will NASA’s Artemis II astronauts see on the moon?
Watch SpaceX launch Starship V3—the tallest and most powerful rocket yet
Claire Cameron · 2026-05-21 · via Scientific American

Friday’s flight could be the most pivotal test of the Starship megarocket

By Claire Cameron edited by Clara Moskowitz & Lee Billings

A rocket blasting off against a gray sky with a cloud of exhaust below it

SpaceX’s Starship lifts off from Starbase in Texas on March 6, 2025.

RONALDO SCHEMIDT/AFP via Getty Images

Updated

May 22, 2026

at

10:00 AM

SpaceX is gearing up to launch the latest and largest version of its Starship megarocket. Lifting off from the company’s Starbase compound in Texas no earlier than 6:30 P.M. EDT tonight, the launch marks the 12th test of Starship and the first demonstration of its V3 design. Lift off was originally slated for Thursday, however a problem with the hydraulic pin holding the launch tower arm in place; SpaceX scrubbed the attempt with just seconds to go.

“For those who think this is simply another repeat test flight, the engineering changes under the rocket ‘hood’ are substantial,” says Joseph Gonzalez, an associate professor of practice in aerospace engineering at the University of Illinois Urbana-Champaign and a former engineer for NASA’s Artemis program. “V3 is taller, exceeds 18 million pounds of total thrust and introduces the new Raptor 3 engines,” he explains.

Fully stacked on top of SpaceX’s Super Heavy booster, the vehicle stands some 408 feet (124 meters) tall and is designed to loft about 100 metric tons of cargo into orbit. Like all SpaceX rockets, it’s meant to come back down to Earth to be reused again and again.


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“The booster architecture has also evolved significantly,” Gonzalez says. “The vehicle moves from four steering grid fins to three much larger and structurally reinforced fins positioned lower on the booster for improved control authority and thermal robustness.” All of these features and more changes to the rocket’s internal and external design will be tested on this flight, he says.

SpaceX’s livestream of the liftoff will begin approximately 45 minutes before the launch window opens at 6:30 P.M. on Friday, May 22. You can watch it on SpaceX’s site or on X.

The suborbital test is aimed at showing that Starship V3 can successfully launch, separate from its booster and then splash down in the Indian Ocean—it is not going to assess the vehicle’s reusability, although SpaceX hopes Starship will eventually be reusable. Along the way, the spacecraft will release 20 dummy Starlink Internet satellites, as well as two operational Starlink satellites that will test hardware for an upcoming Starlink model. These working satellites will scan Starship’s heat shield and beam images back to Earth. The company also hopes to relight one of the Starship’s Raptor engines while in space.

On reentry, the spacecraft will perform a series of maneuvers, including a flip, on its way to splash down into the Indian Ocean (the booster, meanwhile, will drop into the Gulf of Mexico).

It’s a critical moment for SpaceX. Elon Musk’s company could go public in the next month, and a successful test flight of what Musk says will be its most powerful rocket ever will almost certainly buoy investors’ interest in SpaceX—and NASA’s ambitions of using Starship to get astronauts back on the moon by 2028.

“Whether the mission achieves every objective or not, flights like this continue to push the aerospace industry forward and provide invaluable lessons for the next generation of engineers entering the field,” Gonzalez says.

During SpaceX’s livestream of Thursday’s abortive launch attempt, the company also announced another hope pinned to Starship’s success: The dream of a Chinese-born cryptocurrency billionaire, Chun Wang, to ride the vehicle on a two-year interplanetary voyage to fly by Mars. Wang previously flew with SpaceX last year alongside three other crew members on his privately funded Fram2 mission, the first-ever spaceflight to send humans into polar orbit around Earth.

The announcement didn’t disclose the timeline for that launch or other details, but did reveal that the prospective mission would be preceded by another Starship flight carrying Wang around the moon. Wang would be accompanied by others, including pioneering “space tourist” Dennis Tito and his spouse, Akiko Tito, who purchased tickets for the flight in 2022.

A previously planned private lunar mission for Starship, called Dear Moon, had been targeted to launch as early as 2023. The project was cancelled when its backer, the Japanese billionaire Yusaku Maezawa, grew tired of waiting for SpaceX to sort out technical difficulties with its audacious rocket.

Editor’s Note (5/22/2026): This story has been updated.

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