SpaceX will launch its 1st-ever Starship V3 megarocket today. The stakes couldn't be higher

Key Points:

• SpaceX's Starship V3 megarocket is set for its debut flight on May 21 from the Starbase test site in South Texas, aiming for a suborbital launch with controlled ocean splashdowns of its Super Heavy booster and Ship upper stage.
• The 408-foot-tall V3 features significant upgrades, including 33 new V3 Raptor engines on Super Heavy and six on Ship, a redesigned fuel transfer system, and enhanced payload deployment capabilities, including releasing 20 dummy Starlink satellites and two equipped with special cameras.
• V3 Ship is designed for long-duration flights with improved reaction control, cryogenic systems, and docking capabilities for in-space refueling, which is critical for future deep-space missions such as NASA's Artemis moon landings.
• Starship V3 is planned to support NASA's Artemis 4 mission by landing astronauts on the lunar surface around 2028, but it must first achieve Earth orbit, demonstrate off-Earth refueling, and integrate life-support systems to meet NASA's timeline.
• A failure in the V3 debut could delay SpaceX's progress and impact its upcoming IPO valuation, as Starship is central to the company's long-term plans for satellite launches, lunar missions, Mars exploration, and Earth point-to-point transport.