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SpaceX converts Falcon Heavy booster into Falcon 9

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More than two years after the rocket’s last launch, SpaceX appears to have finally decided to give at least one of two surviving Falcon Heavy Block 5 cores a new lease on life as a Falcon 9 booster.

Known as B1052, the Falcon Heavy side core or booster debuted in April 2019 as part of the first flight of the rocket’s Block 5 variant, successfully launching Saudi Arabia’s large Arabsat 6A communications satellite to an almost 90,000 km (56,000 mi) transfer orbit. Following in the footsteps of the first Falcon Heavy, the first Block 5 vehicle repeated its predecessor’s iconic double-landing back at Cape Canaveral. Just 74 days later, both Falcon Heavy Block 5 side boosters B1052 and B1053 launched again, this time supporting the US military’s long-delayed STP-2 rideshare and qualification mission.

From Falcon Heavy side booster to Falcon 9 booster in a handful of months. (Richard Angle)

Once again, B1052 and B1053 stuck near-simultaneous landings at SpaceX’s Landing Zones. Both missions’ center cores, however, weren’t so lucky. During Arabsat 6A, the first Falcon Heavy Block 5 center core did successfully land but high seas eventually toppled the booster, destroying it and leaving few intact remains. During STP-2, CEO Elon Musk revealed that SpaceX didn’t actually expect to recover the mission’s replacement center core due to the exceptionally hot reentry it would need to survive. As predicted, the center core did not survive, with Musk later reporting that the hot reentry damaged thrust vectoring hardware, causing the rocket to veer off course.

USAF photographer James Rainier's remote camera captured this spectacular view of Falcon Heavy Block 5 side boosters B1052 and B1053 returning to SpaceX Landing Zones 1 and 2. (USAF - James Rainier)
Mission complete! Taken by Airmen Alex Preisser, this photo shows B1052 and B1053 shortly after coming to a rest at SpaceX's Landing Zones.
Falcon Heavy Block 5 side boosters B1052 and B1053 rest at SpaceX’s Florida Landing Zones after a flawless launch debut. (USAF – Alex Preisser)
B1052 and B1053 nailed their landings once again – this time at night – after their second mission. (SpaceX)

Thankfully, both side boosters aced all four of their collective landings. However, despite previous statements from Musk indicating that Falcon’s new Block 5 design made it fairly easy to convert Falcon first stages between Falcon 9 and Falcon Heavy side booster configurations, both B1052 and B1053 dropped off the face of the Earth immediately after completing STP-2. Only in September 2021, 27 months later, did one of the two cores finally reappear in public – sans landing legs and grid fins but with a nosecone still installed.

As is now clear, that surprise appearance after years in storage was no coincidence. A bit less than three months later after the mystery Falcon Heavy side booster was spotted rolling down a Kennedy Space Center highway from a Cape Canaveral storage hangar to a new SpaceX facility, one of the two side boosters (B1052) was spotted once again – this time with landing legs and a Falcon 9 interstage installed where a nosecone once sat.

B1052 is reborn. (Richard Angle)

Aside from having clearly been converted into a Falcon 9 booster, former Falcon Heavy side booster B1052 was also mated to a new expendable upper stage – a strong indication of an imminent launch. Word on the ground is that the rocket and transporter were on their way to SpaceX’s Cape Canaveral Space Force Station (CCSFS) LC-40 pad for the company’s planned December 18th launch of Turkey’s Turksat 5B communications satellite.

Following SpaceX’s successful NASA IXPE launch on December 9th, the company has two more East Coast launches planned before the end of the year: Turksat 5B NET December 18th and CRS-24 NET December 21st. Several other Falcon 9 boosters (save for B1062, which is probably assigned to CRS-24) are likely available to launch Turksat 5B, so B1052’s assignment – while not implausible – isn’t guaranteed.

Above all else, B1052’s second life as a Falcon 9 is exciting because it means that B1053 probably isn’t far behind it, meaning that SpaceX’s fleet of operational Falcon boosters is about to grow significantly in a short period of time. As of now, that fleet contains eight Falcon 9 boosters that have each completed an average of more than six orbital-class launches. Half have flown nine times. Aside from expanding that fleet by 25%, the reintroduction of B1052 and B1053 will free up SpaceX to retire older boosters like B1049 and B1051, which CEO Elon Musk has said are slower and more expensive to reuse.

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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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Elon Musk

Tesla is fixing Full Self-Driving’s pothole problem

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Tesla Model Y L in a field
Credit: Tesla

Tesla Full Self-Driving is set to get a major fix with pothole avoidance, a feature that CEO Elon Musk said recently was “coming soon.” The feature has been included within the FSD v14 release notes for some time as an upcoming improvement.

Potholes come in all shapes and sizes, but one thing is universal about them, and that is the fact that every driver wants to avoid them. Driving into or over a pothole can cause tire and wheel damage, alignment issues, and even, in some more severe instances, injury to occupants or major damage to a vehicle in despair.

Tesla Cybercab uses a unique strategy for picking up the right rider

Musk said late last night in a post that pothole avoidance while utilizing the Full Self-Driving suite is “coming soon.”

Full Self-Driving, even in its most recent and robust forms, still has its shortcomings. While the suite has performed exceptionally well with avoiding on-road obstacles like cardboard boxes, horse droppings, car parts, and other debris, it still seems to struggle with recognizing certain things.

Potholes and other abrupt changes in a road’s layout are things that FSD still tends to struggle with. Perhaps the suite’s 3D modeling is still in need of some additional data or some sort of script that will help it to avoid a potentially destructive pothole or bump in the road that would be easily recognizable by the human eye.

Musk has mentioned pothole avoidance for some time, with the initial idea coming in April 2019 when an owner first requested the feature. Musk said that Tesla would “definitely” develop pothole avoidance.

In August 2020, Musk said Tesla was in the process of labeling bumps and potholes so cars can either slow down or steer around them altogether.

Tesla to utilize micro maps for pothole-detection in future update

Avoiding major disturbances in the road is a necessary feature for Full Self-Driving to have, especially as Tesla is working toward a fully autonomous program that will eventually allow every occupant in the vehicle to sleep, work, or enjoy leisure time while traveling.

That truly begins this week with the launch of Cybercab on Thursday.

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Elon Musk

Elon Musk says he knows how to save Earth for a billion years

Elon Musk says sentient AI satellites launched from the Moon could keep Earth livable forever.

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Elon Musk spent part of his weekend describing a plan to keep the planet livable for roughly a billion years, and it starts with satellites that can think for themselves.

In a post on X, Musk argued that swapping fossil fuels for solar and wind power will not be enough to protect humanity from what he called extremely severe extinction events, the kind that occur roughly every 100 million years. His fix is what he called sentient satellites, or solar-powered satellites, controlled by AI, that would sit in a fixed spot between Earth and the Sun after being launched off the Moon using a giant electromagnetic catapult instead of rockets.

The satellites’ onboard AI would make continuous, small adjustments rather than waiting on human instructions. The mass driver is Musk’s proposed way of getting the raw material there cheaply by using an electromagnetic launch track built on the Moon, where lower gravity and no atmosphere make it far easier to fling cargo into space than it is from Earth.

Musk shared a Grok generated estimate suggesting roughly 5 percent of Florida’s land, or about 1.68 million acres, could face regular flooding by 2070 under a high sea level rise scenario, and said humanity has about 50 years to act before coastal living looks very different than it does today.

This is not the first time Musk has floated the idea. He raised a similar concept in November, describing a solar powered AI satellite constellation that could make tiny adjustments to incoming sunlight to fine tune Earth’s temperature. Musk has also tied planetary risk to his broader vision at SpaceX, where his compensation package is explicitly linked to establishing a self-sustaining Mars colony, one he has described as an insurance policy against the kind of extinction event he referenced this weekend, and where he has said humans could set foot within five to seven years.

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OpenAI cites distrust of SpaceX in decision to drop Cursor partnership

OpenAI will cut SpaceX-owned Cursor’s model access in November, citing Musk’s history of broken contracts.

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OpenAI, the company behind ChatGPT, announced late Friday that it is ending its partnership with Cursor, cutting off the coding tool’s access to its models on November 12. The move comes two weeks after SpaceX completed its $60 billion acquisition of Cursor’s parent company, Anysphere, folding the popular AI coding assistant into Elon Musk’s growing SpaceXAI division.

In a post on its website, OpenAI said the decision came down to trust, not technology. “We cannot be confident that SpaceX will use our technology within our terms of service, based on our experience with Elon Musk’s companies violating contracts,” the company wrote. OpenAI pointed to two specific incidents: X, now part of SpaceX, allegedly breaking the terms of an existing OpenAI contract after Musk bought Twitter.

That lawsuit is the backdrop for all of this. Musk cofounded OpenAI in 2015, left the board in 2018, and sued Sam Altman and Greg Brockman in 2024, arguing they abandoned the company’s nonprofit mission for profit. A federal jury sided with OpenAI in May, finding Musk waited too long to sue rather than ruling on the merits of his claims. Musk said at the time he would appeal to the Ninth Circuit, calling the outcome a “calendar technicality” rather than a real judgment.

Elon Musk breaks silence on OpenAI trial decision

SpaceX’s interest in Cursor predates that verdict by weeks. The company first struck a deal with Cursor in April, securing an option to acquire it for $60 billion or pay $10 billion for joint development work instead. As Teslarati reported at the time, the logic was straightforward: Cursor was paying retail prices to Anthropic and OpenAI, two of its most direct competitors, every time a developer used its product, while SpaceX had idle capacity on its Colossus supercomputer, roughly the equivalent of a million Nvidia H100 GPUs, that Cursor could use to train its own models instead. SpaceX exercised the option in June, days after its own IPO, and the deal closed in mid-August.

Once it closed, Musk moved fast. On an all-hands call with more than 1,000 Cursor employees, he reportedly told staff that SpaceXAI’s Grok was playing catchup in the AI race, unlike Tesla and SpaceX in their own markets, and singled out Anthropic as the company to catch. Cursor CEO Michael Truell now reports directly to Musk inside SpaceXAI.

Elon Musk admits he was ‘clearly wrong’ about Anthropic

Losing OpenAI’s models leaves Cursor leaning harder on Anthropic’s Claude, which has its own compute agreement with SpaceX, and on Cursor’s in-house Composer model, the one SpaceX’s compute was supposed to accelerate in the first place. OpenAI framed the November deadline as maximum notice under its contract, and said it wants to “go above and beyond” to help developers through the transition. Whether Anthropic makes the same call is now the open question in AI coding.

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