What was their original mission in space? Wilmore, as commander, and Williams, as pilot, traveled to the ISS on a 15-foot-wide, Boeing-made capsule called Starliner. They launched on June 5 and docked with the ISS on June 6. NASA hopes Starliner will give the organization a new way to get crews to and from the ISS, and the fact that it's Boeing-made is another sign that NASA is starting to lean on the private sector for its human spaceflight options, The New York Times reported. Wilmore and Williams' ISS mission was supposed to last a mere eight days, during which they'd test out aspects of Starliner and see how it operates with a human crew in space. But due to complications with Starliner, the two astronauts are still up there and won't be back before 2025. They've kept busy -- working with the ISS Expedition 71 crew to perform research and maintenance activities, NASA said. How did they get stuck in space? The Starliner was delayed in May due to a problem with a valve in the rocket. Then engineers had to fix a helium leak. That's all bad news for Boeing. It's competing with SpaceX, which has been transporting astronauts to the ISS since 2020, making over 20 successful trips to the space station. Starliner finally launched, atop an Atlas V rocket, on June 5, but some problems came along with it. NASA announced that three helium leaks were identified, one of which was known before flight, and two new ones. In addition to the leaks, the crew had to troubleshoot failed control thrusters, though the craft was able to successfully dock with the ISS. SpaceX has had failures too. A Falcon 9 rocket exploded on the launchpad in 2016. In July of this year, a Falcon 9 rocket experienced a liquid oxygen leak and deployed its satellites in the wrong orbit, The New York Times reported. And a Falcon 9 rocket in late August lost a first-stage booster when it toppled over into the Atlantic Ocean and caught fire. But that said, SpaceX has more than 300 successful Falcon 9 flights to its credit. When and how are the astronauts coming home? NASA was quick to emphasize that the astronauts aren't in any danger. "There is no rush to bring (the) crew home," NASA said in a statement in August. "This is a lesson learned from the space shuttle Columbia accident. Our NASA and Boeing teams are poring over data from additional in-space and ground testing and analysis, providing mission managers data to make the best, safest decision on how and when to return crew home." NASA said on Aug. 24 that it had decided to return Starliner to Earth without a crew, and the spacecraft landed safely in New Mexico on Sept. 6. Wilmore and Williams will be brought home on the SpaceX Crew-9 Dragon spacecraft early next year and "will continue their work formally as part of the Expedition 71/72 crew through February 2025," the space agency said in a statement. "They will fly home aboard a Dragon spacecraft with two other crew members assigned to the agency's SpaceX Crew-9 mission." Four crew members were originally scheduled to be on board at launch, but two stayed behind to make room for Wilmore and Williams' return trip. "Spaceflight is risky, even at its safest and most routine," NASA Administrator Bill Nelson said in a statement on Aug. 24. "A test flight, by nature, is neither safe, nor routine. The decision to keep Butch and Suni aboard the International Space Station and bring Boeing's Starliner home uncrewed is the result of our commitment to safety: our core value and our North Star." Stuck in space: a timeline May: Starliner launch delayed due to a problem with a valve in the rocket, and then a helium leak. June 5: Starliner launches with Williams and Wilmore on board. June 6: Starliner docks with ISS despite dealing with three helium leaks and failed control thrusters. Sept. 6: Starliner departs ISS and lands in New Mexico, leaving Williams and Wilmore behind. Sept. 28: SpaceX Crew-9 mission launches with Hague and Gorbunov on a Dragon spacecraft. Sept. 29: SpaceX Dragon docks with ISS. February 2025 onward: SpaceX Dragon spacecraft will return to Earth with Williams, Wilmore, Hague and Gorbunov. Your guide