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NASA’s SLS Moon rocket almost aces vital prelaunch test on 7th try
Following several incomplete attempts in April, June, August, and September, NASA’s first Space Launch System (SLS) Moon rocket has almost aced a vital prelaunch test on the seventh try.
NASA says that “all objectives were met” during the ten-hour test, which wrapped up around 4:30 pm EDT (20:30 UTC) on Wednesday, September 21st. Despite the rocket running into multiple additional issues, some old and others new, the agency was confident enough in the preliminary results of the wet dress rehearsal (WDR) – deemed a “cryogenic demonstration test” – to reaffirm that it’s still working towards a third launch attempt as early as September 27th.
That launch date is not set in stone, but NASA also hasn’t ruled out the window after the latest round of SLS testing. The agency will host a press conference on Friday, September 23rd, to provide its final decision and offer more details about the seventh wet dress rehearsal.
Despite NASA’s apparent confidence after the test, which was admittedly smoother than most previous SLS tests at the launch pad, it was far from smooth. The immediate story of the “cryogenic demonstration test” dates back to the SLS Artemis I rocket’s second so-called “launch attempt” on September 3rd. During that attempt, the launch was aborted well before SLS was ready when NASA detected a major hydrogen fuel leak around one of the quick-disconnect umbilical panels that fuels and drains the rocket. Remote troubleshooting was unable to solve the problem, forcing NASA to stand down.
Over the last few weeks, teams inspected, tested, and repaired the faulty Tail Service Mast Umbilical (TSMU), preparing for a cryogenic proof test meant to verify that the issue was fixed. During that September 21st test, the TSMU still leaked significantly for the whole duration, but it did so more predictably and – unlike prior leaks – never violated the limits that would trigger a launch abort.
But near the end, a different umbilical panel developed a significant hydrogen leak that did violate those launch constraints, meaning that NASA would have likely had to stand down yet again if it had attempted to launch before completing additional testing. The test was completed successfully, but its goals and constraints were not the same as those facing a launch.
A NASA-developed rocket leaking hydrogen is unfortunately a tale as old as time. That the agency that struggled with hydrogen leaks throughout the 30-year career of the Space Shuttle appears to be just as flabbergasted by nearly identical problems on a new rocket – SLS – that has Shuttle ‘heritage’ on almost every square inch is not surprising, even if it is somewhat embarassing.
Liquid hydrogen fuel always has been and likely always will be a massive pain to manage in any rocket, but especially in a large rocket. As the smallest element in the universe, it is fundamentally leak-prone. Combined with the fact that it only remains liquid below the extraordinarily low temperature of -253°C (-423°F), generates ultra-flammable hydrogen gas as it continually attempts to warm to a more stable temperature, and naturally embrittles most metals, it’s an engineering nightmare by almost every measure.
For all that pain, hydrogen does provide rocket engineers exceptional efficiency when properly exploited, but even that positive aspect is often diminished by hydrogen’s ultra-low density. For rocket stages that have already reached orbit, hydrogen-oxygen propellant offers unbeatable efficiency. But for a rocket stage that will never be used in orbit, like the SLS core stage, hydrogen fuel is rarely worth the tradeoffs – a reality that SLS is unfortunately providing a strong reminder of.
Demonstrating the Groundhog Day-esque nature of NASA rockets and hydrogen leaks, the same leaky TSMU panel that aborted SLS’ September 3rd launch attempt (sixth WDR) and had to be fixed and retested on September 21st also caused a hydrogen leak that partially aborted the rocket’s third wet dress rehearsal attempt in April 2022. NASA then rolled the rocket back to the Vehicle Assembly Building (VAB), where workers spent almost two months inspecting and reworking the fuel TSMU and fixing other issues. During its first test (WDR #4) after rolling back to the pad in June, the same fuel TSMU leaked and NASA had to return the rocket to the VAB again to fix the problem.
The fuel TSMU then leaked on the SLS rocket’s first launch attempt (really WDR #5), but the problem was resolved and was not what caused NASA to stand down. It was, however, a primary reason behind NASA’s second aborted launch attempt (WDR #6). With any luck, the eighth time will be the charm.
News
Tesla launches new feature that cold climate drivers will love
Tesla’s steering wheels are getting better with this simple yet effective software update.

Tesla is launching another new feature in its cars, this time it will cater to those in colder climates, and those drivers will love it.
Perhaps one of the best things about Teslas is that they routinely receive over-the-air software updates that either improve the ownership experience, add features, or make their performance more robust.
Every update offers some sort of bug fix or new feature that simply makes the cars better than they were before. For example, earlier this week, we reported on a new third-party charger latch release feature that will help those with non-Tesla home charging plugs.
Now, Tesla is releasing a new improvement to its heated steering wheel system, which has been around for several years. The new feature is one that will improve its performance and have your wheel nice and toasty the next time you get in, and it is a bit chilly outside.
According to Not a Tesla App, Tesla rolled out the Heated Steering Wheel improvements with the 2024.14 software update:
“If the steering wheel heater is set to Auto, the steering wheel will now heat up based on the cabin temperature, even if the climate system is set manually.
Previously, the climate system needed to be set to Auto for the steering wheel heater to turn on automatically.”
The change impacts all five Tesla models, the release notes state.
The heated steering wheel is one of the features that Tesla has used to help cater the vehicle’s overall performance to those in colder climates.
Tesla Model 3 with heated steering wheel begins US deliveries
Just as the air-conditioned and cooling seats are beneficial during the Summer months, the heated steering wheel is incredibly beneficial to those drivers in colder parts of the globe.
News
Tesla announces massive new achievement with 8 million cars produced
Tesla’s 8 millionth car comes just 8 months after it built its 7 millionth car.

Tesla announced a massive new achievement in relation to its automotive division as it has officially built 8 million cars globally.
The 8 millionth car rolled off production lines at Gigafactory Berlin on Friday, the company announced. The car was an Ultra Red Model Y, images show:
Produced our 8 millionth vehicle at Giga Berlin pic.twitter.com/gv1moWhwTH
— Tesla (@Tesla) June 6, 2025
The car comes just about eight months after Tesla built its 7 millionth car at the Fremont Factory last October, a major accomplishment considering the claims of a lack of demand from the media.
Additionally, Tesla was able to achieve this major threshold with a stoppage in production at each of its four production facilities earlier this year. The manufacturing halt was attributed to a production line changeover for the new Model Y crossover.
The car has been the best-selling vehicle in the world for two consecutive years, and the company pausing production for two weeks, yet still managed to produce one million cars in eight months is impressive.
Tesla currently only produces the Model Y at Gigafactory Berlin, but the car is also manufactured at Gigafactory Shanghai, Gigafactory Texas, and the Fremont Factory.
It is the only model to be produced at all four of Tesla’s global manufacturing plants, which span across three different continents.
Elon Musk
Elon Musk and Donald Trump to speak with each other Friday: report
White House aides have scheduled a call between the CEO and U.S. President on Friday.

Elon Musk and Donald Trump’s feud seems to be thawing, at least to some degree.
As per a recent Politico report, White House aides have scheduled a call between the CEO and U.S. President on Friday.
Musk vs. Trump
Musk turned into a staunch critic of Trump amidst the administration’s efforts to pass the “Big Beautiful Bill,” which the CEO claimed would add trillions to the country’s deficit. Trump, for his part, claimed that Musk turned on him due to the adverse effects of the proposed bill on his companies.
The spat between the two powerful men became so notable that Musk called for the impeachment of Trump on X. He also claimed that Trump was in the Epstein list. The U.S. President, for his part, threatened to cancel billions of dollars worth of government contracts with Musk’s companies such as SpaceX.
Potential Truce
As per Politico, however, White House aides have stepped in to temper the tensions and broker peace between the two powerful men. When asked by the outlet about his ongoing feud with the CEO, Trump reportedly stated that “it’s okay” and that “it’s going very well, never done better.” The U.S. President also highlighted his favorability ratings, stating that his “numbers are through the roof.”
While the CEO was very aggressive against Trump in his X posts, he did back down somewhat after some time. When hedge fund manager Bill Ackman argued that Trump and Musk should make peace for the benefit of the United States, the CEO responded with, “You’re not wrong.” Musk also walked back on his decision to decommission SpaceX’s Dragon spacecraft, which is essential to NASA’s operations.
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