() When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The SpaceX Falcon 9 rocket and Dragon capsule that will fly the Ax-4 astronaut mission to the International Space Station on the launch pad at NASA's Kennedy Space Center in Florida. (Image credit: SpaceX) Update for 10:40 p.m. ET on June 10: SpaceX announced on Tuesday evening that it has delayed the planned June 11 launch of the Ax-4 private astronaut mission to the ISS due to a liquid oxygen leak in its Falcon 9 rocket. No new target date has been announced. SpaceX will launch four astronauts to the International Space Station (ISS) on the private Ax-4 mission Wednesday morning (June 11), and you can watch the action live. Ax-4 is scheduled to lift off atop a Falcon 9 rocket from NASA's Kennedy Space Center in Florida on Wednesday at 8:00 a.m. EDT (1200 GMT). That's a one-day delay; SpaceX had been targeting Tuesday morning (June 10) but pushed things back due to expected high winds in the area. You may like