Sign up for CNN’s Wonder Theory science newsletter for updates on discoveries and advancements. A SpaceX mission, Crew-9, aims to unite Boeing Starliner astronauts with their return spacecraft. NASA’s Suni Williams and Butch Wilmore have been on the ISS over 100 days longer than planned. The launch is set for 1:17 p.m. ET Saturday from Cape Canaveral, with a backup window on Sunday. The event will be streamed live on NASA’s website. The launch was delayed due to Hurricane Helene but is now on track.