Why a SpaceX rocket launch of astronauts can't wait out bad weather - Business Insider

The weather might have cleared up in just 10 to 20 minutes, but the Falcon 9 rocket's launch couldn't wait another second.

However, that's not how the Falcon 9 rocket works, and certainly not with people on board who are trying to reach the football field-size International Space Station . The SpaceX Falcon 9 rocket purges fuel after topping off before scheduled launch of NASA's SpaceX Demo-2 mission to the International Space Station from NASA's Kennedy Space Center in Cape Canaveral, Florida, May 27, 2020.Once SpaceX starts fueling a Falcon 9 rocket, it begins a process in which imprecise timing could mean life or death.

Once inside the rocket, however, the fuel begins to warm up, expand, and boil off. That fuel loss starts the launch clock ticking.

Safety First! Always!... Well done SpaceX/NASA et al!👏🏻

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