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NASA’s SLS Moon rocket rolls out to the launch pad for the first time

SLS has rolled out of the VAB for the first time ever. (Richard Angle)

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Around noon EST on Thursday, March 17th, the high bay doors of NASA’s vast Vehicle Assembly Building (VAB) opened, revealing the first fully assembled Space Launch System (SLS) rocket and Orion spacecraft.

About six hours later, the massive rocket departed the VAB for the first time ever and began a four-mile (6.4 km) journey to Pad 39B atop Crawler-Transporter 2. This is the first time a Moon rocket has rolled out of NASA’s Vehicle Assembly Building since Saturn V headed to Pad 39A for Apollo 17 in 1972.

Crawler-Transporter 2 is a building-sized vehicle responsible for carrying NASA rockets – and their even more massive ‘mobile launch platforms’ – from the assembly building to the launch pad. The 6.6-million-pound (~3000 ton) vehicle has a top speed of two miles per hour (~3.2 km/h) while unloaded and one mile per hour (~1.6 km/h) while loaded and is designed to carry a payload of up to 18 million pounds (~8100 tons). The crawler ultimately took about 11 hours to transport SLS, Orion, and MLP-1 to Launch Complex 39B (LC-39B/Pad 39B).

Once the rocket and MLP-1 are fully installed on Pad 39B and the crawler has moved a safe distance away, SLS will be put through its first series of fully integrated tests, culminating in a wet dress rehearsal (WDR) as few as two weeks from now. Once the wet-dress is complete, SLS will be rolled back to the VAB for final launch preparations, including final Orion spacecraft processing, flight software updates. the identification and the repair of any issues found or wear generated during testing.

SLS heads towards LC-39B – and the Moon. (Richard Angle)

SLS is comprised of a core stage (CS-1), upper stage (the Interim Cryogenic Propulsion Stage or ICPS), two solid rocket boosters (SRBs), an incomplete but spaceworthy Orion spacecraft, and a new mobile launch platform (MLP-1). This particular vehicle will be responsible for Artemis-1, an uncrewed test flight that will attempt to inject Orion into orbit around the Moon. While most of the spacecraft’s systems are in place, Artemis 1’s Orion will have no life support or environmental control hardware installed and also lacks a docking adapter.

NASA and its SLS/Orion contractors have subcontracted parts of the rocket and spacecraft’s development to more than 1,100 companies spread across the US, as well as every NASA center. SLS and Orion prime contractors include Boeing, Aerojet Rocketdyne, Northrup Grumman, and the United Launch Alliance. Once completed and qualified, all hardware was shipped to Kennedy Space Center, where the SLS rocket was then fully assembled inside the VAB. All Artemis 1 hardware arrived at KSC by the end of April 2021.

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NASA says SLS’ launch debut is now expected to occur no earlier than (NET) May or June 2022. However, given the program’s history of delays, particularly surrounding major integrated testing, it’s likely that this stage of SLS testing will take longer than expected, so launch dates should only be treated as placeholders until the rocket has completed prelaunch testing and been inspected and recertified back inside the VAB.

Monica Pappas is a space flight enthusiast living on Florida's Space Coast. As a spaceflight reporter, her goal is to share stories about established and upcoming spaceflight companies. She hopes to share her excitement for the tremendous changes coming in the next few years for human spaceflight.

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SpaceX issues statement on Starship V3 Booster 18 anomaly

The incident unfolded during gas-system pressure testing at the company’s Massey facility in Starbase, Texas. 

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Credit: SpaceX/X

SpaceX has issued an initial statement about Starship Booster 18’s anomaly early Friday. The incident unfolded during gas-system pressure testing at the company’s Massey facility in Starbase, Texas. 

SpaceX’s initial comment

As per SpaceX in a post on its official account on social media platform X, Booster 18 was undergoing gas system pressure tests when the anomaly happened. Despite the nature of the incident, the company emphasized that no propellant was loaded, no engines were installed, and personnel were kept at a safe distance from the booster, resulting in zero injuries.

“Booster 18 suffered an anomaly during gas system pressure testing that we were conducting in advance of structural proof testing. No propellant was on the vehicle, and engines were not yet installed. The teams need time to investigate before we are confident of the cause. No one was injured as we maintain a safe distance for personnel during this type of testing. The site remains clear and we are working plans to safely reenter the site,” SpaceX wrote in its post on X. 

Incident and aftermath

Livestream footage from LabPadre showed Booster 18’s lower half crumpling around the liquid oxygen tank area at approximately 4:04 a.m. CT. Subsequent images posted by on-site observers revealed extensive deformation across the booster’s lower structure. Needless to say, spaceflight observers have noted that Booster 18 would likely be a complete loss due to its anomaly.

Booster 18 had rolled out only a day earlier and was one of the first vehicles in the Starship V3 program. The V3 series incorporates structural reinforcements and reliability upgrades intended to prepare Starship for rapid-reuse testing and eventual tower-catch operations. Elon Musk has been optimistic about Starship V3, previously noting on X that the spacecraft might be able to complete initial missions to Mars.

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Investor's Corner

Tesla analyst maintains $500 PT, says FSD drives better than humans now

The team also met with Tesla leaders for more than an hour to discuss autonomy, chip development, and upcoming deployment plans.

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Credit: Tesla

Tesla (NASDAQ:TSLA) received fresh support from Piper Sandler this week after analysts toured the Fremont Factory and tested the company’s latest Full Self-Driving software. The firm reaffirmed its $500 price target, stating that FSD V14 delivered a notably smooth robotaxi demonstration and may already perform at levels comparable to, if not better than, average human drivers. 

The team also met with Tesla leaders for more than an hour to discuss autonomy, chip development, and upcoming deployment plans.

Analysts highlight autonomy progress

During more than 75 minutes of focused discussions, analysts reportedly focused on FSD v14’s updates. Piper Sandler’s team pointed to meaningful strides in perception, object handling, and overall ride smoothness during the robotaxi demo.

The visit also included discussions on updates to Tesla’s in-house chip initiatives, its Optimus program, and the growth of the company’s battery storage business. Analysts noted that Tesla continues refining cost structures and capital expenditure expectations, which are key elements in future margin recovery, as noted in a Yahoo Finance report. 

Analyst Alexander Potter noted that “we think FSD is a truly impressive product that is (probably) already better at driving than the average American.” This conclusion was strengthened by what he described as a “flawless robotaxi ride to the hotel.”

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Street targets diverge on TSLA

While Piper Sandler stands by its $500 target, it is not the highest estimate on the Street. Wedbush, for one, has a $600 per share price target for TSLA stock.

Other institutions have also weighed in on TSLA stock as of late. HSBC reiterated a Reduce rating with a $131 target, citing a gap between earnings fundamentals and the company’s market value. By contrast, TD Cowen maintained a Buy rating and a $509 target, pointing to strong autonomous driving demonstrations in Austin and the pace of software-driven improvements. 

Stifel analysts also lifted their price target for Tesla to $508 per share over the company’s ongoing robotaxi and FSD programs. 

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SpaceX Starship Version 3 booster crumples in early testing

Photos of the incident’s aftermath suggest that Booster 18 will likely be retired.

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Credit: SpaceX/X

SpaceX’s new Starship first-stage booster, Booster 18, suffered major damage early Friday during its first round of testing in Starbase, Texas, just one day after rolling out of the factory. 

Based on videos of the incident, the lower section of the rocket booster appeared to crumple during a pressurization test. Photos of the incident’s aftermath suggest that Booster 18 will likely be retired. 

Booster test failure

SpaceX began structural and propellant-system verification tests on Booster 18 Thursday night at the Massey’s Test Site, only a few miles from Starbase’s production facilities, as noted in an Ars Technica report. At 4:04 a.m. CT on Friday, a livestream from LabPadre Space captured the booster’s lower half experiencing a sudden destructive event around its liquid oxygen tank section. Post-incident images, shared on X by @StarshipGazer, showed notable deformation in the booster’s lower structure.

Neither SpaceX nor Elon Musk had commented as of Friday morning, but the vehicle’s condition suggests it is likely a complete loss. This is quite unfortunate, as Booster 18 is already part of the Starship V3 program, which includes design fixes and upgrades intended to improve reliability. While SpaceX maintains a rather rapid Starship production line in Starbase, Booster 18 was generally expected to validate the improvements implemented in the V3 program.

Tight deadlines

SpaceX needs Starship boosters and upper stages to begin demonstrating rapid reuse, tower catches, and early operational Starlink missions over the next two years. More critically, NASA’s Artemis program depends on an on-orbit refueling test in the second half of 2026, a requirement for the vehicle’s expected crewed lunar landing around 2028.

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While SpaceX is known for diagnosing failures quickly and returning to testing at unmatched speed, losing the newest-generation booster at the very start of its campaign highlights the immense challenge involved in scaling Starship into a reliable, high-cadence launch system. SpaceX, however, is known for getting things done quickly, so it would not be a surprise if the company manages to figure out what happened to Booster 18 in the near future.

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