NASA is about to reveal the astronauts who will fly over the moon.

Four astronauts, including three Americans and one Canadian, will be tapped by NASA to complete a generation-defining mission to the moon’s orbit. On Monday, the public will finally learn the names of the crew members. Reid Wiseman, a 47-year-old decorated naval aviator and test pilot who was first selected to be a NASA astronaut in 2009, is at the top of the list. Wiseman served as chief of the astronaut office until November 2022 and was responsible for the decision to broaden the pool of candidates eligible to fly in order to include himself. People familiar with the process also told CNN that along with Wiseman, there are a handful of other candidates atop the list.

Victor Glover is a 46-year-old naval aviator who returned to Earth from his first spaceflight in 2021 after piloting the second crewed flight of SpaceX’s Crew Dragon spacecraft and spending nearly six months aboard the International Space Station. Randy Bresnik is also a decorated naval aviator and test pilot who flew combat missions in support of Operation Iraqi Freedom. Anne McClain is a decorated army pilot and West Point graduate who flew more than 200 combat missions in support of Operation Iraqi Freedom and went on to graduate from the US Naval Test Pilot School in 2013. Stephanie Wilson is the most senior astronaut on this list, and she served as a mission specialist on three Space Shuttle flights. Christina Koch is a veteran of six spacewalks who holds the record for the longest single spaceflight by a woman, with a total of 328 days in space.

Jessica Meir is a 45-year-old biologist with a doctorate from the Scripps Institution of Oceanography who was a member of a NASA Extreme Environment Mission Operations (NEEMO) mission in 2002 and completed a two- The Artemis II crew will consist of one astronaut from Canada, Jeremy Hansen, who was selected to be an astronaut almost 14 years ago. NASA has previously committed to selecting a crew with racial, gender and professional diversity, but this has not been the case for high-profile missions. Jeremy Hansen is the first Canadian to be put in charge of training for a new class of NASA astronauts. NASA has also committed to selecting a crew with racial, gender and professional diversity, but this has not been the case for high-profile missions. Jeremy Hansen is the first Canadian to be put in charge of training for a new class of NASA astronauts.

The Artemis II mission will build on the success of Artemis I, an uncrewed test mission that sent NASA’s Orion capsule on a 1.4 million-mile voyage to lap the moon. If all goes to plan, Artemis II will take off around November 2024 and the crew members will launch atop a NASA-developed Space Launch System rocket from NASA’s Kennedy Space Center in Florida. The journey is expected to last about 10 days and will send the crew out beyond the moon, potentially further than any human has traveled in history. After circling the moon, the spacecraft will return to Earth for a splashdown landing in the Pacific Ocean. The Artemis III mission is expected to take off later this decade, but much of the technology the mission will require, including spacesuits for walking on the moon and a lunar lander, is still in development. NASA is targeting a 2025 launch date for Artemis III, though the space agency’s inspector general has already said delays will likely push the mission to 2026 or later.