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NASA spacecraft ready for voyage to the Sun on SpaceX competitor’s biggest rocket (Update)

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Update: Issues with rocket and ground support hardware ran down the August 11 launch window. ULA scrubbed the attempt and has recycled the launch to August 12, 3:31 am EDT/07:31 UTC. The second attempt will again be streamed by NASA TV.


Teslarati photographer Tom Cross is on the ground in Cape Canaveral, Florida ahead of what will most certainly be a spectacular launch of NASA’s sun-bound Parker Solar Probe atop SpaceX competitor ULA’s (United Launch Alliance) Delta IV Heavy, the world’s second most powerful operational rocket.

https://twitter.com/_TomCross_/status/1028082435936997376

Second only to SpaceX’s recently-debuted Falcon Heavy rocket, the Delta IV Heavy (DIVH) is a massive beast of a launch vehicle made up of three single-engine boosters that produce more than 2.1 million pounds of thrust at liftoff. As a side-effect of the rocket’s liquid hydrogen and oxygen fuel choice, DIVH’s booster bodies are a solid 5 meters in diameter (40% wider than Falcon 9) to account for the fact that hydrogen is far less energy-dense than kerosene (Falcon 9’s fuel of choice).

An artist rendering of Parker Solar Probe (right) separating from the rocket’s third stage (left) after sending the craft on its way towards the sun. (Reese Wilson/Teslarati)

The launch of NASA’s Parker Solar Probe (PSP) will be Delta Heavy’s 10th launch since it first debuted in 2004, giving a taste for how infrequently the rocket typically launches – averaging less than once a year. The target of Parker Solar Probe’s mission happens to be the Sun itself, more specifically the dispersed aura of plasma (superheated gas) – known as the solar corona – that surrounds it.

In pursuit of “touching the surface of the sun”, PSP will wind up becoming the fastest human-made object in history, reaching velocities upwards of 200 km/s (120 mi/s) at a distance from the sun of just 6 million km (3.7 million mi). At that unfathomable speed, Parker Solar Probe would travel from Los Angeles to Manhattan in 20 seconds.

That close to the sun, the temperatures PSP will be subjected to are extraordinary, thanks to the fact that sunlight will be a full 500 times more powerful than the light that reaches us humans on and around Earth. To survive temperatures as high as high as 1,377℃ (2,500°F) and keep its highly-sensitive scientific instruments and spacecraft bits at a more reasonable 29.4℃ (85°F), PSP will bring along a heat shield just big enough for the craft to hide behind.

ULA’s Delta IV Heavy is currently scheduled to launch NASA’s Parker Solar Probe from Cape Canaveral at 12:33 am PDT/3:33 am EDT/07:33 UTC. Follow along in real-time with NASA TV’s live coverage of the launch and stay tuned for photos from Teslarati photographer Tom Cross’ remote cameras.

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For prompt updates, on-the-ground perspectives, and unique glimpses of SpaceX’s rocket recovery fleet (including fairing catcher Mr Steven) check out our brand new LaunchPad and LandingZone newsletters!

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 leases new 108k-sq ft R&D facility near Fremont Factory

The lease adds to Tesla’s presence near its primary California manufacturing hub as the company continues investing in autonomy and artificial intelligence.

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Credit: Tesla

Tesla has expanded its footprint near its Fremont Factory by leasing a 108,000-square-foot R&D facility in the East Bay. 

The lease adds to Tesla’s presence near its primary California manufacturing hub as the company continues investing in autonomy and artificial intelligence.

A new Fremont lease

Tesla will occupy the entire building at 45401 Research Ave. in Fremont, as per real estate services firm Colliers. The transaction stands as the second-largest R&D lease of the fourth quarter, trailing only a roughly 115,000-square-foot transaction by Figure AI in San Jose.

As noted in a Silicon Valley Business Journal report, Tesla’s new Fremont lease was completed with landlord Lincoln Property Co., which owns the facility. Colliers stated that Tesla’s Fremont expansion reflects continued demand from established technology companies that are seeking space for engineering, testing, and specialized manufacturing.

Tesla has not disclosed which of its business units will be occupying the building, though Colliers has described the property as suitable for office and R&D functions. Tesla has not issued a comment about its new Fremont lease as of writing.

AI investments

Silicon Valley remains a key region for automakers as vehicles increasingly rely on software, artificial intelligence, and advanced electronics. Erin Keating, senior director of economics and industry insights at Cox Automotive, has stated that Tesla is among the most aggressive auto companies when it comes to software-driven vehicle development.

Other automakers have also expanded their presence in the area. Rivian operates an autonomy and core technology hub in Palo Alto, while GM maintains an AI center of excellence in Mountain View. Toyota is also relocating its software and autonomy unit to a newly upgraded property in Santa Clara.

Despite these expansions, Colliers has noted that Silicon Valley posted nearly 444,000 square feet of net occupancy losses in Q4 2025, pushing overall vacancy to 11.2%.

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Tesla winter weather test: How long does it take to melt 8 inches of snow?

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Credit: Teslarati

In Pennsylvania, we got between 10 and 12 inches of snow over the weekend as a nasty Winter storm ripped through a large portion of the country, bringing snow to some areas and nasty ice storms to others.

I have had a Model Y Performance for the week courtesy of Tesla, which got the car to me last Monday. Today was my last full day with it before I take it back to my local showroom, and with all the accumulation on it, I decided to run a cool little experiment: How long would it take for Tesla’s Defrost feature to melt 8 inches of snow?

Tesla Model Y Performance set for new market entrance in Q1

Tesla’s Defrost feature is one of the best and most underrated that the car has in its arsenal. While every car out there has a defrost setting, Tesla’s can be activated through the Smartphone App and is one of the better-performing systems in my opinion.

It has come in handy a lot through the Fall and Winter, helping clear up my windshield more efficiently while also clearing up more of the front glass than other cars I’ve owned.

The test was simple: don’t touch any of the ice or snow with my ice scraper, and let the car do all the work, no matter how long it took. Of course, it would be quicker to just clear the ice off manually, but I really wanted to see how long it would take.

Tesla Model Y heat pump takes on Model S resistive heating in defrosting showdown

Observations

I started this test at around 10:30 a.m. It was still pretty cloudy and cold out, and I knew the latter portion of the test would get some help from the Sun as it was expected to come out around noon, maybe a little bit after.

I cranked it up and set my iPhone up on a tripod, and activated the Time Lapse feature in the Camera settings.

The rest of the test was sitting and waiting.

It didn’t take long to see some difference. In fact, by the 20-minute mark, there was some notable melting of snow and ice along the sides of the windshield near the A Pillar.

However, this test was not one that was “efficient” in any manner; it took about three hours and 40 minutes to get the snow to a point where I would feel comfortable driving out in public. In no way would I do this normally; I simply wanted to see how it would do with a massive accumulation of snow.

It did well, but in the future, I’ll stick to clearing it off manually and using the Defrost setting for clearing up some ice before the gym in the morning.

Check out the video of the test below:

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Tesla Robotaxi ride-hailing without a Safety Monitor proves to be difficult

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Credit: Grok Imagine

Tesla Robotaxi ride-hailing without a Safety Monitor is proving to be a difficult task, according to some riders who made the journey to Austin to attempt to ride in one of its vehicles that has zero supervision.

Last week, Tesla officially removed Safety Monitors from some — not all — of its Robotaxi vehicles in Austin, Texas, answering skeptics who said the vehicles still needed supervision to operate safely and efficiently.

BREAKING: Tesla launches public Robotaxi rides in Austin with no Safety Monitor

Tesla aimed to remove Safety Monitors before the end of 2025, and it did, but only to company employees. It made the move last week to open the rides to the public, just a couple of weeks late to its original goal, but the accomplishment was impressive, nonetheless.

However, the small number of Robotaxis that are operating without Safety Monitors has proven difficult to hail for a ride. David Moss, who has gained notoriety recently as the person who has traveled over 10,000 miles in his Tesla on Full Self-Driving v14 without any interventions, made it to Austin last week.

He has tried to get a ride in a Safety Monitor-less Robotaxi for the better part of four days, and after 38 attempts, he still has yet to grab one:

Tesla said last week that it was rolling out a controlled test of the Safety Monitor-less Robotaxis. Ashok Elluswamy, who heads the AI program at Tesla, confirmed that the company was “starting with a few unsupervised vehicles mixed in with the broader Robotaxi fleet with Safety Monitors,” and that “the ratio will increase over time.”

This is a good strategy that prioritizes safety and keeps the company’s controlled rollout at the forefront of the Robotaxi rollout.

However, it will be interesting to see how quickly the company can scale these completely monitor-less rides. It has proven to be extremely difficult to get one, but that is understandable considering only a handful of the cars in the entire Austin fleet are operating with no supervision within the vehicle.

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