NASA astronaut candidate Matthew Dominick, third from right in the front row, answers a question during a live episode of the Administrator's monthly chat show, Watch This Space, along with fellow members of the 2017 astronaut candidate class, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine speaks with NASA and Canadian Space Agency astronaut candidates following a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

Astronaut candidates, back row from left, Jonny Kim, Joshua Kutryk of the Canadian Space Agency, Jasmin Moghbeli, Loral O’Hara, Frank Rubio, Jennifer Sidey-Gibbons of the Canadian Space Agency, Jessica Watkins, front row from left, Kayla Barron, Zena Cardman, Raja Chari, Matthew Dominick, Bob Hines, and Warren Hoburg are seen during a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine introduces the 2017 astronaut candidates during a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

Astronaut candidates, back row from left, Jonny Kim, Joshua Kutryk of the Canadian Space Agency, Jasmin Moghbeli, Loral O’Hara, Frank Rubio, Jennifer Sidey-Gibbons of the Canadian Space Agency, Jessica Watkins, front row from left, Kayla Barron, Zena Cardman, Raja Chari, Matthew Dominick, Bob Hines, and Warren Hoburg listen to a question from NASA Administrator Jim Bridenstine during a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)