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SpaceX to livestream Falcon Heavy Block 5 launch debut at 6:15pm ET today

SpaceX CEO Elon Musk celebrates the success of Falcon Heavy's 2018 launch debut. (SpaceX/National Geographic)

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SpaceX is half a day away from the planned launch debut of Falcon Heavy Block 5, a milestone that will also be the rocket’s second launch ever and first mission with a commercial payload.

First and foremost, Falcon Heavy’s job is to safely place the Saudi Arabian communications satellite Arabsat 6A into a high-energy geostationary transfer orbit (GTO) more than 35,000 km (~22,000 mi) above Earth’s surface. Despite the satellite weighing no less than 6000 kg (13,200 lb), Falcon Heavy will still have enough latent performance to attempt the recovery of all three of its new Block 5 boosters. With any luck, this will hopefully return SpaceX’s East Coast landing zones (LZ-1 and LZ-2) to successful operations after an anomaly in December 2018 caused Falcon 9 B1051 to landing a mile or so offshore.

This time around, Falcon Heavy will be made entirely out of Block 5 hardware, including three new boosters (likely B1052, B1053, and B1055), a Block 5 upper stage with a Merlin Vacuum engine, and a recovery-optimized “Version 2” payload fairing. Altogether, Falcon Heavy likely weighs upwards of 80,000 kg (175,000 lb) empty and more than 1,420 metric tons (3,125,000 lb) when fully fueled. At liftoff, the Falcon Heavy Block 5 rocket’s 27 Merlin 1D engines are expected to produce no less than 5.1 million pounds (~2300 mT/23,000 kN) of thrust at full throttle, but that figure could rise as high as 5.6 million pounds (2550 mT/25,500 kN) of thrust depending on how one interprets rather vague official numbers from CEO Elon Musk.

Regardless, both Falcon Heavy side boosters will attempt to repeat the iconic side-by-side landings that are now a signature of the rocket’s 2018 launch debut, while the center core – traveling much faster at the point of stage separation – will travel nearly 1000 km (620 mi) downrange for a landing aboard drone ship Of Course I Still Love You (OCISLY). Ranging from multiple sonic booms that will be audible for miles up and down the Florida coast and the potential to a potentially spectacular Florida sunset as a backdrop, Falcon Heavy’s second launch will be an event worth watching.

The first Block 5 version of Falcon Heavy prepares for its launch debut. The rocket is comprised of three first stage boosters, likely B1052, B1053, and B1055. (SpaceX)

Falcon Heavy Flight 2 is made even more exciting by the fact that both of its Block 5 side boosters will be instrumental to a planned third launch of the SpaceX rocket as few as two months later. According to the US Air Force, an agreement was reached with SpaceX to use the opportunity – an intentionally low-risk mission known as Space Test Program 2 (STP-2) – to gain a much higher-fidelity understanding of how SpaceX launches, lands, refurbishes, and relaunches Falcon boosters. Aside from being the last major source of data for the ultimate certification of Falcon Heavy for high-value military launches, the USAF hopes that STP-2 will be a critical step towards opening the doors of launch contract competitions to flight-proven rockets like Falcon 9 and – eventually – Blue Origin’s New Glenn.

SpaceX’s launch webcast will go live approximately 20 minutes before liftoff, with the window stretching from 6:35 pm to 8:31 pm EDT (22:35-00:31 UTC). Weather is expected to be decent and is currently holding around 80% “go” for launch.

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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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SpaceX Starship Flight 9 recap: objectives & outcomes

Each test fuels progress. Starship Flight 9 provided critical data for future missions. One step closer to the Red Planet!

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(Credit: SpaceX)

SpaceX’s Starship Flight 9 launched at 7:37 p.m. EDT from Starbase Texas on May 27, 2025.

The Starship Flight 9 launch included the B14-2 Super Heavy Booster previously used in Flight 7. Ship 35 (S35) made up the upper stage in Flight 9. Overall, 33 Raptor engines were on the booster. Six Raptor engines were on the upper stage of Starship.

Starship Flight 9 Objectives

  • Demonstrate booster reuse by recovering B14-2 after separation.
  • Deploy eight Starlink satellite simulators from Ship 35’s payload bay.
  • Perform an in-space Raptor engine relight to test orbital maneuvering capabilities.
  • Test upgraded heat shield tiles, including metallic and actively cooled variants, for improved re-entry performance.
  • Achieve a controlled re-entry and splashdown of Ship 35 in the Indian Ocean.

Starship Flight 9 Outcomes

Booster Performance: Post-separation, B14-2 executed a boost-back burn to return toward the Gulf of Mexico for a planned catch or splashdown. However, the booster was lost over the Gulf of Mexico. SpaceX acknowledged that it did not achieve its planned recovery and has not specified the cause of the loss.

Upper Stage Performance: Ship 35 reached a suborbital trajectory with an apogee of 189 km. SpaceX attempted to deploy eight Starlink satellite simulators from S35. However, the ship’s payload bay door failed to open and prevented deployment.

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SpaceX planned a Raptor engine relight in space for the upper stage but did not confirm a successful attempt. During Ship 35’s re-entry over the Indian Ocean, fuel leaked, causing a loss of attitude control.

SpaceX’s Conclusion

SpaceX concluded that Starship Flight 9 was a partial success. The company’s conclusion was based on the valuable data it gathered from reusing the booster, heat shield performance, and system behavior.

Starship Flight 9’s Significance

Flight 9 provided critical data to achieve SpaceX’s goal of making Starship fully reusable. Reusability will reduce the cost of missions to Earth orbit, the Moon, and Mars. Ship 35’s failure to deploy Starlink satellites revealed an issue that SpaceX would need to fix. After all, Starlink deployment is essential for Starship’s commercial viability.

Elon Musk noted that Starship Flight tests are essential steps toward human missions to Mars and eventually making life multiplanetary.

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SpaceX Starship gets FAA nod for ninth test flight

The FAA has given the green light for Starship’s ninth test flight.

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(Credit: SpaceX)

SpaceX has received FAA approval for the ninth test flight of the Starship rocket. The approval was delayed due to the federal agency finishing its comprehensive safety review of the eighth flight earlier this year.

The FAA said in a statement that it has determined that SpaceX has “satisfactorily addressed the causes of the mishap, and therefore, the Starship vehicle can return to flight.”

The eighth test flight occurred back on March 6. SpaceX completed a successful liftoff of Starship and the Super Heavy Booster, before the two entered stage separation a few minutes after launch.

Starship Flight 8: SpaceX nails Super Heavy booster catch but loses upper stage

The booster returned and was caught by the chopsticks on the launch pad, completing the second successful booster catch in the program’s history. However, SpaceX lost contact with Starship in the upper atmosphere.

The ship broke up and reentered the atmosphere over Florida and the Bahamas.

The debris situation caused the FAA to initiate a mishap investigation:

The FAA said it will verify that SpaceX implements all the corrective actions on Flight 9 that it discovered during the mishap investigation.

There is no current confirmed launch window, but the earliest it could take off from Starbase is Tuesday, May 27, at 6:30 p.m. local time.

To prevent any injuries and potentially limit any damage, the FAA has stayed in contact with various countries that could be impacted if another loss of vehicle occurs:

“The FAA is in close contact and collaboration with the United Kingdom, Turks & Caicos Islands, Bahamas, Mexico, and Cuba as the agency continues to monitor SpaceX’s compliance with all public safety and other regulatory requirements.”

The agency has also stated that the Aircraft Hazard Area (AHA) is approximately 1,600 nautical miles and extends eastward from the Starbase, Texas, launch site through the Straits of Florida, including the Bahamas and Turks & Caicos.

For flight 8, the AHA was just 885 nautical miles.

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Starship Flight 9 nears as SpaceX’s Starbase becomes a Texan City

SpaceX’s launch site is officially incorporated as Starbase, TX. Starship Flight 9 could launch on May 27, 2025. 

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(Credit: Jenny Hautmann/Wikimedia Commons)

SpaceX’s Starbase is officially incorporated as a city in Texas, aligning with preparations for Starship Flight 9. The newly formed city in Cameron County serves as the heart of SpaceX’s Starship program.

Starbase City spans 1.5 square miles, encompassing SpaceX’s launch facility and company-owned land. A near-unanimous vote by residents, who were mostly SpaceX employees, led to its incorporation. SpaceX’s Vice President of Test and Launch, Bobby Peden, was elected mayor of Starbase. The new Texas city also has two SpaceX employees as commissioners. All Starbase officials will serve two-year terms unless extended to four by voters.

As the new city takes shape, SpaceX is preparing for the Starship Flight 9 launch, which is tentatively scheduled for May 27, 2025, at 6:30 PM CDT from Starbase, Texas.

SpaceX secured Federal Aviation Administration (FAA) approval for up to 25 annual Starship and Super Heavy launches from the site. However, the FAA emphasized that “there are other licensing requirements still to be completed,” including policy, safety, and environmental reviews.

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On May 15, the FAA noted SpaceX updated its launch license for Flight 9, but added: “SpaceX may not launch until the FAA either closes the Starship Flight 8 mishap investigation or makes a return to flight determination. The FAA is reviewing the mishap report SpaceX submitted on May 14.”

Proposed Texas legislation could empower Starbase officials to close local highways and restrict Boca Chica Beach access during launches. Cameron County Judge Eddie Trevino, Jr., opposes the Texas legislation, insisting beach access remain under county control. This tension highlights the balance between SpaceX’s ambitions and local interests.

Starbase’s incorporation strengthens SpaceX’s operational base as it gears up for Starship Flight 9, a critical step in its mission to revolutionize space travel. With growing infrastructure and regulatory hurdles in focus, Starbase is poised to become a cornerstone of SpaceX’s vision, blending community development with cutting-edge aerospace innovation.

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