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SpaceX CEO Elon Musk teases steel Starship on the Moon and Mars
SpaceX CEO Elon Musk has published the first official renders of the company’s updated stainless steel Starship, offering glimpses of the spacecraft on both the Moon and Mars.
Although the designs of Starship and Super Heavy (formerly BFS and BFR) have shifted significantly over the past three years, the vehicle’s primary destinations have remained stable. Above all else, SpaceX remains focused on designing its next-gen rocket to be the best spacecraft ever built for transporting huge payloads and humans to the Moon, Mars, and ultimately throughout the solar system. The interplanetary future of Starship is currently an unknown quantity but SpaceX is already building the first full-scale orbital prototype and testing multiple finished versions of the Raptor engine that will power it.
As discussed earlier today, SpaceX has already completed a low-fidelity prototype of Starship known as Starhopper, designed to – per its namesake – perform low-altitude, low-velocity hop tests. Powered by Raptor, Starhopper also acts as a mobile test stand for the next-gen rocket engine meant to power both Starship and its Super Heavy booster. SpaceX’s current planning has delayed a vacuum variant of the engine for several years, instead choosing to standardize the same Raptor engine across both stages of BFR. Starship will feature seven Raptor engines producing ~14,000 kN (~3.2M lbf) of thrust, while Super Heavy’s latest iteration would require a 31 Raptors and produce a staggering 62,000 kN/14M lbf of thrust at liftoff.
That performance – theoretically making Starship/Super Heavy almost two times as powerful as Saturn V – is essential to support massive missions to Mars and the Moon while also enabling complete reusability of the rocket. SpaceX rightly judged that rapid, low-effort reusability is the only way to truly revolutionize the cost of access to orbit, at least for the indefinite future. This need itself piggybacks on CEO Elon Musk’s founding motivation: to make humanity a multi-planetary species and protect it against future mass-extinction events.
Musk has long viewed the Moon as a distraction to that goal, offering very little prospect of being more than a detour, but both NASA and the political apparatus currently controlling the US have decided that a rebranded Moon return is desirable. Repeating several nearly identical Moon return proposals from the last few decades, the political powers that be have yet to actually put any money where their mouths are. SpaceX and Musk have nonetheless jumped on the bandwagon, a pragmatic decision to hedge bets in case funding actually appears. Unsurprisingly, SpaceX is interested in any opportunity to acquire federal funding for its expensive Starship/Super Heavy/Raptor development programs.
In September 2018, SpaceX announced plans to send Japanese billionaire Yusaku Maezawa and 8-10 artists of his choice on the first Starship mission around the Moon. According to Musk, that could happen as early as 2023 but will necessarily be preceded by at least one uncrewed demonstration of Starship’s performance in deep space. Given the nominal reusability of Starship, the same spacecraft might perform both missions.
In the meantime, SpaceX is in the process of building the first orbital Starship prototype, although it’s unclear just how advanced the vehicle will be. Depending on how polished and successful SpaceX’s Starship Alpha (for lack of a better term) is, it’s conceivable that the spacecraft could be retrofitted or upgraded for actual demonstration missions to deep space or the Moon. To enable the long-term reusability of Starships, SpaceX will need to rely on in-orbit refueling by way of dedicated tanker launches. However, a lower-fidelity prototype that might otherwise be scrapped could be a prime candidate for a one-way Moon-impact or lunar-landing mission, reducing risk for future crewed or uncrewed Starship missions to the Moon before SpaceX has the facilities and hardware to support simultaneous Starship and tanker launches.
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Elon Musk makes a key Tesla Optimus detail official
“Since we are naming the singular, we will also name the plural, so Optimi it is,” Musk wrote on X.
Tesla CEO Elon Musk just made a key detail about Optimus official. In a post on X, the CEO clarified some key wording about Optimus, which should help the media and the public become more familiar with the humanoid robot.
Elon Musk makes Optimus’ plural term official
Elon Musk posted a number of Optimus-related posts on X this weekend. On Saturday, he stated that Optimus would be the Von Neumann probe, a machine that could eventually be capable of replicating itself. This capability, it seems, would be the key to Tesla achieving Elon Musk’s ambitious Optimus production targets.
Amidst the conversations about Optimus on X, a user of the social media platform asked the CEO what the plural term for the humanoid robot will be. As per Musk, Tesla will be setting the plural term for Optimus since the company also decided on the robot’s singular term. “Since we are naming the singular, we will also name the plural, so Optimi it is,” Musk wrote in his reply on X.
This makes it official. For media outlets such as Teslarati, numerous Optimus bots are now called Optimi. It rolls off the tongue pretty well, too.
Optimi will be a common sight worldwide
While Musk’s comment may seem pretty mundane to some, it is actually very important. Optimus is intended to be Tesla’s highest volume product, with the CEO estimating that the humanoid robot could eventually see annual production rates in the hundreds of millions, perhaps even more. Since Optimi will be a very common sight worldwide, it is good that people can now get used to terms describing the humanoid robot.
-->During the Tesla 2025 Annual Shareholder Meeting, Musk stated that the humanoid robot will see “the fastest production ramp of any product of any large complex manufactured product ever,” starting with a one-million-Optimi-per-year production line at the Fremont Factory. Giga Texas would get an even bigger Optimus production line, which should be capable of producing tens of millions of Optimi per year.
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Tesla is improving Giga Berlin’s free “Giga Train” service for employees
With this initiative, Tesla aims to boost the number of Gigafactory Berlin employees commuting by rail while keeping the shuttle free for all riders.
Tesla will expand its factory shuttle service in Germany beginning January 4, adding direct rail trips from Berlin Ostbahnhof to Giga Berlin-Brandenburg in Grünheide.
With this initiative, Tesla aims to boost the number of Gigafactory Berlin employees commuting by rail while keeping the shuttle free for all riders.
New shuttle route
As noted in a report from rbb24, the updated service, which will start January 4, will run between the Berlin Ostbahnhof East Station and the Erkner Station at the Gigafactory Berlin complex. Tesla stated that the timetable mirrors shift changes for the facility’s employees, and similar to before, the service will be completely free. The train will offer six direct trips per day as well.
“The service includes six daily trips, which also cover our shift times. The trains will run between Berlin Ostbahnhof (with a stop at Ostkreuz) and Erkner station to the Gigafactory,” Tesla Germany stated.
Even with construction continuing at Fangschleuse and Köpenick stations, the company said the route has been optimized to maintain a predictable 35-minute travel time. The update follows earlier phases of Tesla’s “Giga Train” program, which initially connected Erkner to the factory grounds before expanding to Berlin-Lichtenberg.
-->Tesla pushes for majority rail commuting
Tesla began production at Grünheide in March 2022, and the factory’s workforce has since grown to around 11,500 employees, with an estimated 60% commuting from Berlin. The facility produces the Model Y, Tesla’s best-selling vehicle, for both Germany and other territories.
The company has repeatedly emphasized its goal of having more than half its staff use public transportation rather than cars, positioning the shuttle as a key part of that initiative. In keeping with the factory’s sustainability focus, Tesla continues to allow even non-employees to ride the shuttle free of charge, making it a broader mobility option for the area.
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Tesla Model 3 and Model Y dominate China’s real-world efficiency tests
The Tesla Model 3 posted 20.8 kWh/100 km while the Model Y followed closely at 21.8 kWh/100 km.
Tesla’s Model 3 and Model Y once again led the field in a new real-world energy-consumption test conducted by China’s Autohome, outperforming numerous rival electric vehicles in controlled conditions.
The results, which placed both Teslas in the top two spots, prompted Xiaomi CEO Lei Jun to acknowledge Tesla’s efficiency advantage while noting that his company’s vehicles will continue refining its own models to close the gap.
Tesla secures top efficiency results
Autohome’s evaluation placed all vehicles under identical conditions, such as a full 375-kg load, cabin temperature fixed at 24°C on automatic climate control, and a steady cruising speed of 120 km/h. In this environment, the Tesla Model 3 posted 20.8 kWh/100 km while the Model Y followed closely at 21.8 kWh/100 km, as noted in a Sina News report.
These figures positioned Tesla’s vehicles firmly at the top of the ranking and highlighted their continued leadership in long-range efficiency. The test also highlighted how drivetrain optimization, software management, and aerodynamic profiles remain key differentiators in high-speed, cold-weather scenarios where many electric cars struggle to maintain low consumption.
Xiaomi’s Lei Jun pledges to continue learning from Tesla
Following the results, Xiaomi CEO Lei Jun noted that the Xiaomi SU7 actually performed well overall but naturally consumed more energy due to its larger C-segment footprint and higher specification. He reiterated that factors such as size and weight contributed to the difference in real-world consumption compared to Tesla. Still, the executive noted that Xiaomi will continue to learn from the veteran EV maker.
“The Xiaomi SU7’s energy consumption performance is also very good; you can take a closer look. The fact that its test results are weaker than Tesla’s is partly due to objective reasons: the Xiaomi SU7 is a C-segment car, larger and with higher specifications, making it heavier and naturally increasing energy consumption. Of course, we will continue to learn from Tesla and further optimize its energy consumption performance!” Lei Jun wrote in a post on Weibo.
-->Lei Jun has repeatedly described Tesla as the global benchmark for EV efficiency, previously stating that Xiaomi may require three to five years to match its leadership. He has also been very supportive of FSD, even testing the system in the United States.
Elon Musk makes a key Tesla Optimus detail official
Tesla is improving Giga Berlin’s free “Giga Train” service for employees
