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SpaceX Inspiration4 astronaut shares behind-the-scenes look at largest space window’s ‘first light’
SpaceX Inspiration4 astronaut Sian Proctor has shared the first behind-the-scenes look at what it was like for the world’s first all-private astronaut crew to witness the largest window ever flown in space for the first time.
In front of the camera: Hayley Arceneaux, now the youngest American astronaut in history and the first person ever to fly in space (or orbit) with an internal prosthetic. The mission: Inspiration4, a philanthropic creation of billionaire and CEO Jared Isaacman heavily focused on raising money (and awareness) for St. Jude’s Children’s Hospital and the fight against childhood cancer. While, as many an internet-goer will be more than eager to point out, Isaacman could have technically donated ~10% – not ~5% – of his net worth and been done with it, he instead decided to commit $100M to St. Jude’s and shepherd the world’s first all-private crewed orbital spaceflight into existence.
Private orbital spaceflight is not unique – seven other paying customers have flown to orbit and back in the 21st century. What Jared conceived of, however, is. Instead of a rather less inspirational mishmash of anyone rich enough to pay ~$20-40M for a seat, Isaacman chose to invite three relatively ordinary people along for the ride and even raffled one of the three ‘tickets’ to any American willing to donate $10 or more to the fight against childhood cancer. A step further, thanks to an excellent and transparent social media presence, millions of people from around the world got to follow the mission’s progress, watch a large portion of it live, and generally be awed by an important step forward for spaceflight and inspired by one of the most simultaneously eclectic and ordinary astronaut crew of all time.
More to the point, millions of people (or at least hundreds of thousands, for now) wouldn’t have gotten to vicariously experience the sheer joy of the first orbital cancer survivor experiencing the largest, most uninterrupted window ever flown in space for the first time. Officially known as the ‘cupola,’ SpaceX conceived of, designed, built, qualified, and flew the massive dome window in less than a year from start to finish.
Measuring around 1.2m (3.9 ft) wide and around 0.8-1m (2.5-3.2 ft) wide on the inside, Inspiration4’s cupola might offer less internal volume than NASA’s decade-old International Space Station cupola, but it makes up for the tighter space with the largest seamless window ever flown in space. Likely made out of several layers of acrylic domes not dissimilar to the ‘bubbles’ one might come across at aquariums, the innermost ‘layer’ of Dragon’s cupola carries an odd brownish hue but the glass (technically plastic) is still almost completely transparent and has no ‘frame’ or interruptions save for where it attaches to the spacecraft itself.
Thankfully, by all appearances, that brownish hue – perhaps some kind of optical coating or a tint to reduce glare – isn’t easily discernable from the inside looking out. Instead, the uninterrupted window practically melts away into a crystal-clear nothing, offering what has to be one of the best views available in space.
Given that SpaceX reportedly turned Dragon’s cupola from idea to reality in the matter of a single year and for a single customer, it’s difficult to imagine what additional upgrades could be realized on future Dragon spacecraft. Already, a senior SpaceX director says that the company is seriously considering building one or several new Dragons solely for private astronaut launches after receiving a massive uptick in demand for tickets to orbit. Even before Inspiration4 had splashed down, CEO Elon Musk promised that future flights would offer in-flight internet and hot food with the addition of a small oven/heater and a connection to the company’s own Starlink satellite constellation.
If SpaceX were to build an entirely new Dragon just for private free-flyer launches, it could potentially implement significant design changes as long as they didn’t appreciably lower safety. Given that an exclusively free-flying Dragon would never need to worry about docking in orbit, SpaceX might even be able to tweak the nosecone and make the cupola wider and taller. The possibilities may be far from endless but the fact that SpaceX would consider a modification as extreme as the cupola that flew on Inspiration4 in the first place suggests that the company is quite a lot more confident – and more willing to make big changes – than one might have previously guessed.
Investor's Corner
Tesla has a Cybercab problem nobody saw coming
Tesla’s Cybercab line now builds robotaxis faster than Tesla can deploy them, Lars Moravy says.
Tesla’s Cybercab line in Texas can now build the two seat robotaxi faster than the company can put it into service, according to Lars Moravy, Tesla’s Vice President of Vehicle Engineering. “We don’t run every day because the line can run so fast. It’s currently outpacing our deployments,” Moravy said in a new Cybercab deep dive from Munro Live. “So, it’s a bit of a race right now. Who’s going to go faster? Right now the manufacturing line’s ahead.”
Tesla’s official Robotaxi account shared a Cybercab analysis video on X on Monday, calling it a “Cybercab engineering deep dive.” Moravy’s comments go further than what he told analysts on the Q3 earnings call last week, when he said the Cybercab line’s listed capacity of more than 125,000 units a year undersells what it can actually run.
The tour shows where that speed comes from. Tesla’s unboxed process splits the Cybercab into front, rear, side and center modules that are built and tested on their own before they meet on a short final line. That final line has just 25 fully automated stations, which Tesla’s team estimated is a fifth to a tenth of what a Model Y needs. The full line is about 78% automated, the framing line is already at 100%, and the layout uses roughly 50% less floor space per vehicle. The stated goal is “100% automation in 10 second cycle time,” or one finished Cybercab every 10 seconds.
Tesla also deleted the paint shop. Only the side modules are coated, and the exterior panels get their color inside the molding machine. Engineers said the car is designed to run at least 500,000 miles, which matters for a vehicle that will spend most of its day carrying riders.
The battery got the same treatment. The Cybercab uses an 88S6P pack of 4680 cells in a steel enclosure, a first for Tesla, with each module potted separately so a single failed module can be swapped instead of the whole pack. Wireless battery management boards replace a wiring harness, and new contactors are fast enough to drop the pyro fuse entirely. Tesla’s battery director graded the pack an A minus, compared with a D for the Model Y structural pack and a B minus for Cybertruck. Up front, the drive unit runs an 11:1 gear ratio versus roughly 9:1 on most Teslas, since the Cybercab does not need a high top speed.
Cybercab engineering deep dive — Robotaxi (@robotaxi) October 26, 2026
The deployment side is now the bottleneck Moravy described. Tesla had more than 50 Cybercabs working the Formula 1 weekend in Austin, and Texas records show 463 Cybercabs registered. Tesla said on its earnings call that Cybercab service will launch in Dallas next month, and Moravy said the company is aiming to get Cybercabs to customers by the end of 2026. Every unit built so far has gone into Tesla’s own fleet since the line moved into volume production in April.
Munro Live also asked when it could get a Cybercab to tear down. Tesla’s answer: “Not yet.”
SpaceX’s Raptor engine family has steadily increased sea-level thrust while simultaneously reducing mass, turning iterative engineering gains into substantially higher performance for the Super Heavy booster. CEO Elon Musk shed more light on how powerful Raptor 4 will be, and it’s pretty crazy.
Raptor 1 delivered 185 metric tons of thrust at roughly 2,080 kilograms, while Raptor 2 raised that to 230 tons while cutting mass to about 1,630 kilograms. SpaceX data for Raptor 3 lists a target of 280 tons at 1,525 kilograms (with further reductions in associated vehicle hardware), while operational flight ratings have been cited near 250 tons.
This morning, Elon Musk stated that Raptor 4 is expected to reach 300 tons of sea-level thrust at roughly the same mass as Raptor 3. Across these versions, thrust has risen by more than 60 percent from the first engines while engine mass has fallen, producing a sharp improvement in thrust-to-weight ratio. This is a true testament to how great SpaceX engineering has been:
🚀 Elon says Raptor 4 will make 300 tons of thrust at sea level at roughly the same mass as Raptor 3.
How far Raptor has come:
Raptor 1: 185 tf, 2,080 kg
Raptor 2: 230 tf, 1,630 kg
Raptor 3: 250 tf, 1,525 kg
Raptor 4: 300 tf33 on Super Heavy = ~9,900 tf, nearly 3x Saturn V https://t.co/HQDswZhyvL
— TESLARATI (@Teslarati) October 26, 2026
With 33 engines on SuperHeavy, the jump from earlier versions to a 300-ton Raptor 4 would produce roughly 9,900 metric tons of total liftoff thrust, nearly three times the Saturn V’s approximately 3,400 metric tons from its five F-1 engines.
This is not just a larger number on a data sheet, either, as sea-level thrust is the force available the moment the vehicle leaves the pad. This is when it is heaviest and still deep in Earth’s gravity well and dense atmosphere.
Higher levels of sea-level thrust directly improves the initial thrust-to-weight ratio of the full stack. A higher ratio produces faster acceleration off the pad, which shortens the time the rocket has to spend fighting gravity, and gravity losses during the first minute or two of the flight are a major drain on total available delta-v. Every second shaved off of that early climb preserves more propellant energy for reaching orbital velocity or for carrying extra payload.
Because Super Heavy’s engine count is constrained by vehicle diameter and packing density, increasing thrust per engine is the most straightforward way to raise total liftoff performance without redesigning the booster structure or design.
The same-mass target for Raptor 4 is equally important. Holding engine mass roughly constant while raising thrust improves the engine’s own thrust-to-weight ratio and reduces the structural and propellant mass fraction that must be carried solely to support the engines.
Earlier Raptor iterations also simplified or eliminated extensive vehicle-side hardware such as heat shields. These gains compound: more force for less installed mass leaves additional capacity for propellant, payload, or operational margins such as engine-out capability.
For Starship’s architecture, the practical effects are large. Greater liftoff thrust supports heavier vehicles, larger propellant loads, and higher payloads to low Earth orbit, figures SpaceX has targeted in the 100-plus-ton reusable range. That capacity underpins orbital refueling, lunar missions, and eventual Mars cargo and crew flights.
Continued growth in sea-level thrust therefore tightens the gap between theoretical rocket performance and the high flight rates and reusability needed to make large-scale space transport practical.
Tesla has expanded its Tesla Assisted Driving (TAD) suite to its tenth European country, as Latvia joined a growing list of European Union member states authorizing the company’s advanced driver assistance technology.
Tesla Europe announced this morning that the system is now approved in Latvia, with a software rollout to begin soon.
The approval and rollout follow recognition of a provisional European type approval originally granted by the Netherlands’ RDW authority on April 10.
🚨 Latvia has just received approval for Tesla Full Self-Driving (Supervised)
This is the 10th country in the EU to gain approval:
1. Netherlands — 10 April 2026 (original RDW approval)
2. Lithuania — 20 May 2026
3. Estonia — 29 May 2026
4. Denmark — 9 June 2026
5. Belgium — 10 June 2026
6. Slovenia — 7 September 2026
7. Czechia — 21 September 2026
8. Croatia — 29 September 2026
9. Slovakia — 16 October 2026— TESLARATI (@Teslarati) October 26, 2026
Latvia’s Road Traffic Safety Directorate (CSDD) evaluated the Dutch documentation, coordinated with the other national authorities, and reviewed updates from Tesla. These included tightened limits on speed offsets, automatic resets of any manual speed adjustments after each trip, and stronger driver monitoring.
In Europe, the feature is marketed as Tesla Assisted Driving after a recent rule change that labeled the name “Full Self-Driving” as misleading.
The system remains an SAE Level 2 driver assistance tool, not unsupervised autonomy. It can control speed, steering, braking, lane changes, and intersections while following a navigation route. Drivers need not keep their hands on the wheel at all times, yet they must continuously monitor the road and be prepared to intervene immediately.
The sequence of EU recognitions began with the Netherlands in April and continued through Lithuania, Estonia, Denmark, Belgium, Slovenia, Czechia, Croatia, and Slovakia. Most have relied on mutual recognition of the single Dutch provisional approval rather than independent national testing.
These national clearances do not yet constitute bloc-wide authorization. An EU-wide decision requires a qualified majority in the Technical Committee on Motor Vehicles: at least 15 of 27 member states representing 65 percent of the EU population. Larger markets, like Germany, France, and Italy, remain under review, and a vote is expected this December.
However, for Latvian Tesla owners with compatible vehicles and software, the imminent rollout expands access to the supervised system while underscoring that attentive human oversight remains essential.
Tesla has a Cybercab problem nobody saw coming
How SpaceX Is raising Raptor’s sea-level thrust while holding engine mass steady
