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SpaceX Crew Dragon spaceship to bring NASA astronauts home this summer

Captured by Russian cosmonaut Ivan Vagner, Crew Dragon is set to return two NASA astronauts to Earth later this summer. (Ivan Vagner)

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Bob Behnken and Doug Hurley launched to the space station on May 30, for an indeterminate amount of time. Their stay on orbit depends upon a few different factors, including solar array degradation, the status of the next Crew Dragon, and landing zone weather. While Bob and Doug do not yet have a definitive return date, NASA officials have said they are looking at August as a return time frame.

The mission, known as Demo-2, is the first to fly humans from Florida since the end of the shuttle program in 2011. It’s also SpaceX’s first mission to carry astronauts. But it won’t be the last. The California-based aerospace company is gearing up for its next crewed mission. Known as Crew-1, this flight will see three NASA astronauts, and one Japanese astronaut soar to the space station inside another Crew Dragon capsule.

The two missions are interconnected. Demo-2 is the final test flight of the Crew Dragon capsule, and at the end of the mission, NASA is expected to certify the craft to regularly carry humans to and from the space station. For nearly a decade, NASA has been solely dependent upon Russia to carry its astronauts, but now, the agency will have more flexibility with flights.

The Crew Dragon spacecraft that will be used for the Crew-1 mission for NASA’s Commercial Crew Program undergoes processing inside the clean room at SpaceX headquarters in Hawthorne, California. The Crew-1 mission to the International Space Station is targeted for later in 2020 with NASA Astronauts Victor Glover, Mike Hopkins, Shannon Walker and JAXA astronaut Soichi Noguchi.

Before Demo-2 launched, NASA officials estimated that the Bob and Doug could stay on station anywhere from one to four months. The agency wanted to see how the Dragon performed on orbit before specifying the length of time the crew would remain on orbit.

“We didn’t prescribe the length of the Demo-2 mission until we got the crew on orbit and we could see the performance of the Dragon,” Ken Bowersox, acting administrator for NASA’s human spaceflight program said on Tuesday. “The Dragon is doing very well, so we think it’s reasonable for the crew to stay up there a month or two. The actual details are still being worked out.”

Bowersox explained that the mission is going well, and the spacecraft is holding up as expected. The Crew version of SpaceX’s Dragon capsule has been to the space station one other time. During its first test flight, called Demo-1. This mission launched in 2019, without people on board. The craft proved it could dock and undock itself with the space station, and even spent about a week attached to the orbital outpost.

A SpaceX Falcon 9 rocket blasts off from Pad 39A on May 30, carrying Bob and Doug into space. Credit: R. Angle/Teslarati

Now, NASA and SpaceX are putting the craft through its paces and seeing how well it holds up over time against the harsh environment of outer space. Some of the craft’s most sensitive electronics, namely the solar panels, have a shelf life in space. That time period is limited to 120 days, so NASA wants the crew to come home before that time.

The next batch of astronauts are expected to launch in late August or early September, if all goes according to plan. But, in order for them to launch, Bob and Doug have to come home several weeks before the planned liftoff so that the Dragon can be evaluated and certified.

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To that end, NASA is looking at bringing the Demo-2 crew home in late July or early August. This will allow them to help with station maintenance, as well perform a spacewalk or two. Since April, Chris Cassidy has been the sole NASA astronauts on board, as the space station has been operating on a skeleton crew. The addition of Bob and Doug allows the crew to do more routine maintenance, as well as some research experiments.

Bob Behnken will assist Chris Cassidy on two spacewalks. The duo will replace the space station’s external batteries as new ones were recently delivered on a Japanese cargo vehicle. Credit: Bob Behnken/NASA

Bob Behnken is expected to perform at least two spacewalks — one in late June, followed by one in early July. Behnken will join Chris Cassidy in replacing batteries on the space station’s exterior. The batteries were delivered on a recent cargo resupply  mission and will help power the space station.

While Behnken is suited up and working outside the station, Doug Hurley will operate the space station’s robotic arm, helping Behnken and Cassidy move about during their spacewalks.

The plans were brought up in a joint meeting on Tuesday of the National Academies of Sciences, Engineering and Medicine’s Space Studies Board and the Aeronautics and Space Engineering Board.

Crew Dragon will splashdown in the Atlantic ocean after undocking from the space station. NASA estimates that could happen sometime in August. Credit: SpaceX

“It is very likely that by the end of July, we will have conducted some spacewalks with Chris Cassidy and Bob Behnken, replaced some batteries on the ISS, and we’ll — about two months from now — start thinking about bringing Bob and Doug home,” Bowersox said. “We’d like to get them home some time in August.”

Bowersox is a former astronaut, who flew on five shuttle missions. He recently took over as acting head of NASA’s human spaceflight division after the previous administrator, Doug Loverro, suddenly resigned. That change in leadership took place just days before Hurley and Behnken took flight. Industry sources say Loverro’s departure had to do with him breaking agency rules during a competition to procure bids for NASA’s upcoming lunar lander program.

While the timing was suspect, the Demo-2 mission was unaffected and went off without a hitch.

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I write about space, science, and future tech.

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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.

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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.

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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.”

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How SpaceX Is raising Raptor’s sea-level thrust while holding engine mass steady

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Credit: SpaceX

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:

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.

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Tesla Assisted Driving expands to tenth EU country

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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’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.

Tesla starts showing how FSD will change lives in Europe

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.

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