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SpaceX scrubs launch of Starship V3—the tallest and most powerful rocket ever built

SpaceX has delayed the inaugural test flight of its upgraded Starship V3 megarocket, the most powerful launch vehicle ever built, with a second attempt potentially scheduled for Friday.

Key Points

  • The Starship V3 vehicle stands 408 feet tall and generates over 18 million pounds of thrust using new Raptor 3 engines.
  • SpaceX has invested approximately $15 billion into the Starship program, including $3 billion spent during 2025 alone.
  • The upcoming test flight aims to demonstrate successful stage separation and a controlled splashdown in the Indian Ocean.
  • The mission will deploy 20 dummy Starlink satellites and two operational units designed to monitor the spacecraft's heat shield performance.
  • The Super Heavy booster is slated to land in the Gulf of Mexico, while the spacecraft will perform reentry maneuvers before splashdown.

Why it Matters

A successful demonstration of the V3 design is critical for SpaceX as the company prepares for a highly anticipated initial public offering. Furthermore, the rocket's performance is essential for NASA’s Artemis program, which relies on Starship to return astronauts to the moon by 2028.
Scientific American Published by Claire Cameron
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