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SpaceX Starship SN4 prototype explodes in dramatic fireball

SN4 exploded in a massive fireball shortly after completing its fifth static fire test. (NASASpaceflight - bocachicagal)

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SpaceX’s latest Starship prototype, SN4, exploded today following a static fire test. The explosion happened around 1:49 p.m. CDT (11849 GMT), at the company’s testing site in South Texas. The incident produced a massive fireball, which erupted about a minute after the brief static fire test.

Today’s test is the fifth static fire test of this particular prototype, and the second this week. On May 28, the prototype successfully fired up for its fourth test and everything seemed to go as planned. No word yet on what caused today’s anomaly.

SpaceX was gearing up for a hop test of this particular prototype, with the craft expected to take flight on Monday, June 1. SpaceX received approval from the Federal Aviation Administration (FAA) yesterday for the upcoming test flight, during which the craft will soar to 500 feet (150 meters).

SN4 is the latest prototype in a series of developmental craft that SpaceX has been building as it designs its Starship rocket. Each prototype has met a similar fiery end, with one having already completed a short hop. SN4 has survived longer than any of its predecessors, but luckily SpaceX has its next iteration nearly complete.

Dubbed SN5, that vehicle will complete the company’s next round of tests. The license SpaceX received from the FAA is very different from previous permits and enables the company to have more freedom. For instance, previous licenses have listed specific height limits and only allowed for a single flight. This launch license is more a blanket permission.

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Starhopper’s ACS pods work to keep the Starship prototype stable just prior to landing on August 27th. (SpaceX)

When it’s completed, Starship will stand approximately 165-feet-tall (50 meters) and will be able to carry astronauts and cargo to the moon, Mars, and beyond. SpaceX says they’ve designed the craft to launch on a Super Heavy booster and carry as many as 100 people into space.

Last month, the still-in-development craft snagged a major accolade: a NASA contract to potentially deliver astronauts to the moon as part of NASA’s upcoming Artemis moon program. The first Artemis flights are expected to take off in 2024, with crewed flights following soon after.

Bob Behnken and Doug Hurley are preparing the pilot the Crew Dragon spacecraft to the ISS. Credit: NASA

This explosion comes on the eve of another major milestone for SpaceX — launching astronauts to the International Space Station. That mission, called Demo-2, will feature a Falcon 9 rocket, and Crew Dragon spacecraft that will transport two astronauts into space. The flight was originally scheduled for Wednesday, May 27, but poor weather at the launch site prevented the rocket from lifting off. 

NASA and SpaceX are now targeting a new launch day of May 30 at 3:22 p.m. EDT (1522 GMT).

I write about space, science, and future tech.

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Tesla accused of infringing robotics patents in new lawsuit

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tesla store in New York City
Credit: Tesla

Tesla is being accused of infringing robotics patents by a company called Perrone Robotics, which is based out of Charlottesville, Virginia.

The suit was filed in Alexandria, Virginia, and accuses Tesla of knowingly infringing upon five patents related to robotics systems for self-driving vehicles.

The company said its founder, Paul Perrone, developed general-purpose robotics operating systems for individual robots and automated devices.

Perrone Robotics claims that all Tesla vehicles utilizing the company’s Autopilot suite within the last six years infringe the five patents, according to a report from Reuters.

Tesla’s new Safety Report shows Autopilot is nine times safer than humans

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One patent was something the company attempted to sell to Tesla back in 2017. The five patents cover a “General Purpose Operating System for Robotics,” otherwise known as GPROS.

The GPROS suite includes extensions for autonomous vehicle controls, path planning, and sensor fusion. One key patent, U.S. 10,331,136, was explicitly offered to Tesla by Perrone back in 2017, but the company rejected it.

The suit aims to halt any further infringements and seeks unspecified damages.

This is far from the first suit Tesla has been involved in, including one from his year with Perceptive Automata LLC, which accused Tesla of infringing on AI models to interpret pedestrian/cyclist intent via cameras without licensing. Tesla appeared in court in August, but its motion to dismiss was partially denied earlier this month.

Tesla also settled a suit with Arsus LLC, which accused Autopilot’s electronic stability features of infringing on rollover prevention tech. Tesla won via an inter partes review in September.

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Most of these cases involve non-practicing entities or startups asserting broad autonomous vehicle patents against Tesla’s rapid iteration.

Tesla typically counters with those inter partes reviews, claiming invalidity. Tesla has successfully defended about 70 percent of the autonomous vehicle lawsuits it has been involved in since 2020, but settlements are common to avoid discovery costs.

The case is Perrone Robotics Inc v Tesla Inc, U.S. District Court, Eastern District of Virginia, No. 25-02156. Tesla has not yet listed an attorney for the case, according to the report.

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Tesla has passed a critical self-driving milestone Elon Musk listed in Master Plan Part Deux

Tesla China announced that the company’s Autopilot system has accumulated 10 billion kilometers of driving experience.

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Tesla has passed a key milestone, and it was one that CEO Elon Musk initially mentioned more than nine years ago when he published Master Plan, Part Deux. 

As per Tesla China in a post on its official Weibo account, the company’s Autopilot system has accumulated over 10 billion kilometers of real-world driving experience.

Tesla China’s subtle, but huge announcement

In its Weibo post, Tesla China announced that the company’s Autopilot system has accumulated 10 billion kilometers of driving experience. “In this respect, Tesla vehicles equipped with Autopilot technology can be considered to have the world’s most experienced and seasoned driver.” 

Tesla AI’s handle on Weibo also highlighted a key advantage of the company’s self-driving system. “It will never drive under the influence of alcohol, be distracted, or be fatigued,” the team wrote. “We believe that advancements in Autopilot technology will save more lives.”

Tesla China did not clarify exactly what it meant by “Autopilot” in its Weibo post, though the company’s intense focus on FSD over the past years suggests that the term includes miles that were driven by FSD (Beta) and Full Self-Driving (Supervised). Either way, 10 billion cumulative miles of real-world data is something that few, if any, competitors could compete with.

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Elon Musk’s 10-billion-km estimate, way back in 2016

When Elon Musk published Master Plan Part Deux, he outlined his vision for the company’s autonomous driving system. At the time, Autopilot was still very new, though Musk was already envisioning how the system could get regulatory approval worldwide. He estimated that worldwide regulatory approval will probably require around 10 billion miles of real-world driving data, which was an impossible-sounding amount at the time. 

“Even once the software is highly refined and far better than the average human driver, there will still be a significant time gap, varying widely by jurisdiction, before true self-driving is approved by regulators. We expect that worldwide regulatory approval will require something on the order of 6 billion miles (10 billion km). Current fleet learning is happening at just over 3 million miles (5 million km) per day,” Musk wrote. 

It’s quite interesting but Tesla is indeed getting regulatory approval for FSD (Supervised) at a steady pace today, at a time when 10 billion miles of data has been achieved. The system has been active in the United States and has since been rolled out to other countries such as Australia, New Zealand, China, and, more recently, South Korea. Expectations are high that Tesla could secure FSD approval in Europe sometime next year as well. 

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SpaceX maintains unbelievable Starship target despite Booster 18 incident

It appears that it will take more than an anomaly to stop SpaceX’s march towards Starship V3’s refinement.

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Credit: SpaceX/X

SpaceX recently shared an incredibly ambitious and bold update about Starship V3’s 12th test flight. 

Despite the anomaly that damaged Booster 18, SpaceX maintained that it was still following its plans for the upgraded spacecraft and booster for the coming months. Needless to say, it appears that it will take more than an anomaly to stop SpaceX’s march towards Starship V3’s refinement. 

Starship V3 is still on a rapid development path

SpaceX’s update was posted through the private space company’s official account on social media platform X. As per the company, “the Starbase team plans to have the next Super Heavy booster stacked in December, which puts it on pace with the test schedule planned for the first Starship V3 vehicle and associated ground systems.” 

SpaceX then announced that Starship V3’s maiden flight is still expected to happen early next year. “Starship’s twelfth flight test remains targeted for the first quarter of 2026,” the company wrote in its post on X. 

Elon Musk mentioned a similar timeline on X earlier this year. In the lead up to Starshp Flight 11, which proved flawless, Musk stated that “Starship V3 is a massive upgrade from the current V2 and should be through production and testing by end of year, with heavy flight activity next year.” Musk has also mentioned that Starship V3 should be good enough to use for initial Mars missions.

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Booster 18 failure not slowing Starship V3’s schedule

SpaceX’s bold update came after Booster 18 experienced a major anomaly during gas system pressure testing at SpaceX’s Massey facility in Starbase, Texas. SpaceX confirmed in a post on X that no propellant was loaded, no engines were installed, and personnel were positioned at a safe distance when the booster’s lower section crumpled, resulting in no injuries.

Still, livestream footage showed significant damage around the liquid oxygen tank area of Booster 18, leading observers to speculate that the booster was a total loss. Booster 18 was among the earliest vehicles in the Starship V3 series, making the failure notable. Despite the setback, Starship V3’s development plans appear unchanged, with SpaceX pushing ahead of its Q1 2026 test flight target.

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