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SpaceX’s first high-altitude Starship prototype just “passed cryo proof” testing

Elon Musk says that SpaceX's first high-altitude Starship prototype has passed its first major test. (NASASpaceflight - bocachicagal)

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5 years ago

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SpaceX CEO Elon Musk says that the first high-altitude Starship prototype – known as SN8 – just “passed cryo proof” testing in South Texas, potentially setting the ship up for a ~15 km (9.5 mile) flight test in the near future.

Meanwhile, NASA astronaut Bob Hines recently overflew SpaceX’s Boca Chica, Texas Starship factory with several compatriots, offering an excellent aerial view of the company’s bustling facilities in the midst of Starship SN8’s critical cryo proof test campaign.

Hines managed to catch the Moon alongside one of the T-38 trainer jets NASA astronauts routinely use for training and travel, serving as a reminder that SpaceX won $135 million to build a Lunar Starship that might someday return humans to Earth’s lone companion. Likely with or without NASA’s involvement, the Starship prototype production and test program SpaceX is deep in the midst of will directly determine if and when the company visits – and lands on – the Moon and Mars.

A spectacular aerial view of SpaceX’s Boca Chica, Texas Starship factory, captured by one of the NASA astronauts that might one day ride Starship to the Moon. (Bob Hines – NASA)

Over the last three days, SpaceX has gradually put Starship SN8 – the first prototype meant for high-altitude flight testing – through its paces, beginning with a seemingly aborted “cryo proof” test on October 5/6. During the first attempt, SpaceX appeared to pressurize the rocket tank section with cold nitrogen gas and perhaps a small volume of liquid nitrogen before reopening the highway. Starship SN8 also actuated its large aft flaps under its own power for the first time on October 4th and SpaceX has performed several more actuation tests in the days since.

24 hours later, SpaceX tried again, this time successfully loading Starship SN8’s liquid oxygen and methane propellant tanks with perhaps a thousand metric tons (2.2 million pounds) of liquid nitrogen – used to simulate the ultra-cold temperatures of cryogenic propellant without the risk of a catastrophic fire or explosion. After cryo load, SpaceX reportedly attempted to pressurize the rocket’s tanks to their limits but the test was stopped somewhat short when Starship SN8 sprung “a small leak…near the engine mounts” after reaching pressures of 7 bar (~100 psi).

Precisely as Musk predicted, SpaceX apparently managed to fix the minor leak in less than 24 hours and began the third round of Starship SN8 cryo proof testing late on October 7th. Once again, the rocket was fully loaded with liquid nitrogen and spent some 2-3 hours under cryogenic stress as SpaceX likely stress the thrust structure (“thrust puck”) by simulating the thrust of Raptor engines with hydraulic rams. Nothing out of the ordinary happened and Musk has yet to comment on the test, suggesting that things went largely as planned.

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Intriguingly, SpaceX then geared up for a fourth night of cryogenic testing on October 8/9. It’s not entirely surprising that the company would want to test the first Starship built primarily with a new steel alloy as thoroughly as possible. If SN8’s fourth night of testing produces satisfactory results and SpaceX is less than concerned with the leak discovered during the second round of testing, the company could be ready to install three engines and attempt the first multi-Raptor static fire test ever.

Update: SpaceX CEO Elon Musk says that Starship SN8 “passed cryo proof” testing, most likely setting the rocket up for the first triple-Raptor static fire test ever attempted. If SN8 passes static fire testing, it will most likely be outfitted with a nosecone and forward flaps and attempt another three-engine static fire using smaller ‘header’ propellant tanks, ultimately preparing it to support the first high-altitude flight test of a Starship prototype if all goes according to plan.

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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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Tesla eyes two new states for Robotaxi

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15 hours ago

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October 14, 2025

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Credit: @TerrapinTerpene/X

Tesla has officially shown that it is eyeing two new states for Robotaxi operation in the U.S., as it hopes to add the new areas to its ever-growing list of places where the suite is either active or in the testing phase.

Tesla first launched its Robotaxi suite in Austin, Texas, in late June. It expanded the suite to the San Francisco Bay Area just a month later. Since then, it has not launched any public rides in any other states, but it has gained several approvals for early testing.

Tesla officially launches Robotaxi service with no driver

In preparation for operation in new states, Tesla routinely lists job postings on its Careers website, which helps align potential employees with opportunities ahead of regulatory approvals. This is a strategy that allows Tesla to start operations immediately upon licensing for testing.

Tesla started hiring Vehicle Operators for Autopilot in Arizona and Nevada months before the company gained any sort of approvals from state governments for Robotaxi. However, those approvals eventually came in the form of testing licenses, which allow the company to perform validation ahead of its public launch.

Tesla begins validating Robotaxi in a new area, hinting at expansion

Now, Tesla has posted job listings for Vehicle Operators for Autopilot in two new states: Colorado and Illinois. The Colorado job listing is located in Aurora, a suburb of Denver. Tesla is looking for Robotaxi operators in Chicago as well.

These postings hint toward Tesla’s continuing efforts to expand Robotaxi to new places. Earlier this year, CEO Elon Musk said the company would like to have Robotaxi available to at least half of the U.S. population.

It has expanded significantly since its initial launch in late June, but it is still a far way off from where Tesla would like it to be by year’s end.

So far, Tesla has job listings for Autopilot Vehicle Operators in Arizona, California, Texas, Florida, Colorado, Nevada, and Illinois.

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Elon Musk

Tesla launched an ad for Elon Musk’s pay package on Paramount+

Published

17 hours ago

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October 14, 2025

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Credit: Tesla

Tesla’s advertising strategy has taken a drastic turn as the company’s upcoming Shareholder Meeting will feature perhaps the most crucial vote in its history: the approval of CEO Elon Musk’s new pay package.

For years, the issue of Tesla’s advertising and marketing strategy has been a major point of conversation for investors in fans. It seems to be split right down the middle, with half wanting Tesla to set aside some money for advertising. The other half, just the opposite.

Tesla has been transparent that the money it would spend on advertising, marketing, and public relations is better set aside for the development of future products.

However, it has recently adopted a different tone in advertising, pushing some commercials on social media platforms like X and Instagram.

For the first time, an ad was seen on streaming services like Paramount+, but it wasn’t promoting Tesla’s products directly. Instead, it was more of a message for shareholders to vote on Musk’s pay package, something Tesla feels is a necessity:

“The future of Tesla is in your hands,” the ad reads at the end. It seems as if Tesla is taking whatever steps it needs to accomplish the task of getting Musk a new pay package and retaining him as its CEO.

On September 5, Tesla officially outlined its plans for a CEO Performance Award for Musk. It would require him to lift Tesla’s market capitalization to about $8.5 trillion, up from the $1.36 trillion it sits at today.

Elon Musk’s new pay plan ties trillionaire status to Tesla’s $8.5 trillion valuation

It is obvious that Tesla is really hoping to get the pay package passed and is willing to shift some of its budget to encourage shareholders to vote.

However, there are some interesting perspectives on the move, and it’s sort of strange to see Tesla not advertising its vehicles or products, but only its pay package that would get its CEO paid.

Some of those who saw the ad are questioning the strategy:

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Tesla Robotaxi testing in Arizona is ramping up quickly

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18 hours ago

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October 14, 2025

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Credit: Tesla

Tesla is validating Robotaxi in a new area, and as the company has continued to gain some additional permissions to begin testing in new states, it seems its Full Self-Driving-based ride-hailing project is moving toward a larger footprint.

Two Robotaxi units with LiDAR validation equipment were spotted in Gilbert, Arizona, recently, showing that Tesla is aiming to launch its ride-hailing service in the state soon:

Another unit was spotted in Tempe, Arizona:

These types of validation vehicles have been spotted in several areas ahead of their launch as a public ride-hailing service for passengers. Tesla first launched Robotaxi in Austin, Texas, back in late June, and since then, it has expanded to the Bay Area of California.

However, Tesla has continued to attempt to expand Robotaxi to other areas as well, including Nevada and Arizona. It has also been working toward approvals in other states based on job postings, as Tesla is hiring for Autopilot Vehicle Operators in New York and Florida, as well.

The expansion of the Robotaxi ride-hailing service has been an effort that Tesla has been spending a lot of time on over the past few months. CEO Elon Musk said the expansion aims to bring Robotaxi to at least half of the U.S. population by the end of the year, but there is still plenty of work to be done.

Tesla Robotaxi heads to a new major Texas city for the first time

Tesla did make its Robotaxi app public in recent months, allowing more members of the public to experience the suite for themselves, as long as they could get to Austin or the Bay Area.

In the coming months, it seems more apparent that Tesla will take a broader focus on expanding Robotaxi, especially with the fact that these validation vehicles are being spotted throughout different parts of the United States.

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