A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch at 11:17 a.m. EDT from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch at 11:17 a.m. EDT from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch at 11:17 a.m. EDT from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as members of the media are seen next to the countdown clock at NASA’s Kennedy Space Center Press Site ahead of launch of Axiom Mission 1 (Ax-1), Friday, April 8, 2022, in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch at 11:17 a.m. EDT from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Thursday, April 7, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Thursday, April 7, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Thursday, April 7, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Thursday, April 7, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Thursday, April 7, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket, with the company's Crew Dragon spacecraft atop, sits on the pad at Launch Complex 39A at NASA’s Kennedy Space Center in Florida on April 8, 2022, in preparation for the Axiom Mission 1 (Ax-1) liftoff. Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, soars into the sky from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, lifts off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, lifts off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, soars into the sky from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, lifts off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, soars into the sky from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, lifts off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket, carrying the company's Crew Dragon spacecraft, lifts off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 11:17 a.m. EST on April 8, 2022, on Axiom Mission 1 (Ax-1). Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are aboard the flight to the International Space Station. The Ax-1 mission is the first private astronaut mission to the space station.

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A during a brief static fire test ahead of Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on no earlier than March 20, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A during a brief static fire test ahead of Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on no earlier than March 20, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B as the Artemis I launch team prepares for the next attempt of the wet dress rehearsal test, right, as a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B as the Artemis I launch team prepares for the next attempt of the wet dress rehearsal test, right, as a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B as the Artemis I launch team prepares for the next attempt of the wet dress rehearsal test, right, as a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B as the Artemis I launch team prepares for the next attempt of the wet dress rehearsal test, left, as a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard atop a mobile launcher at Launch Complex 39B as the Artemis I launch team prepares for the next attempt of the wet dress rehearsal test, left, and a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), are seen illuminated by spotlights, Thursday, April 7, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada launched on April 8 at 11:17 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B as the Artemis I launch team prepares for the next attempt of the wet dress rehearsal test, right, as a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B as the Artemis I launch team prepares for the next attempt of the wet dress rehearsal test, right, as a SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft aboard is seen on the launch pad at Launch Complex 39A as preparations continue for Axiom Mission 1 (Ax-1), Wednesday, April 6, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. Ax-1 crew members Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada are scheduled to launch on April 8 from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B, left, as a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B, right, as a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B, left, as a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B, right, as a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

NASA’s Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen atop a mobile launcher at Launch Complex 39B, left, as a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on Axiom Mission 1 (Ax-1) to the International Space Station with Commander Michael López-Alegría of Spain and the United States, Pilot Larry Connor of the United States, and Mission Specialists Eytan Stibbe of Israel, and Mark Pathy of Canada aboard, Friday, April 8, 2022, at NASA’s Kennedy Space Center in Florida. The Ax-1 mission is the first private astronaut mission to the International Space Station. López-Alegría, Connor, Pathy, Stibbe launched at 11:17 a.m. from Launch Complex 39A at the Kennedy Space Center to begin their 10-day mission. Photo Credit: (NASA/Joel Kowsky)

The first stage of a two-stage SpaceX Falcon 9 rocket makes its descent toward Landing Zone 1 at Cape Canaveral Space Force Station after lifting off from NASA Kennedy Space Center’s Launch Complex 39A in Florida for the Axiom Mission 2 (Ax-2) on May 21, 2023. Ax-2 is the second all private astronaut mission to the International Space Station, sending Commander Peggy Whitson, Pilot John Shoffner, and Mission Specialists Ali Alqarni and Rayyanah Barnawi to the orbiting laboratory, where they will spend about 10 days conducting scientific research, outreach, and commercial activities. Liftoff occurred at 5:37 p.m. EDT.

This color-coded map shows the strength of surface gravity around Orientale basin on Earth's moon, derived from data obtained by NASA's GRAIL mission. The GRAIL mission produced a very high-resolution map of gravity over the surface of the entire moon. This plot is zoomed in on the part of that map that features Orientale basin, where the two GRAIL spacecraft flew extremely low near the end of their mission. Their close proximity to the basin made the probes' measurements particularly sensitive to the gravitational acceleration there (due to the inverse squared law). The color scale plots the gravitational acceleration in units of "gals," where 1 gal is one centimeter per second squared, or about 1/1000th of the gravitational acceleration at Earth's surface. (The unit was devised in honor of the astronomer Galileo). Labels on the x and y axes represent latitude and longitude. http://photojournal.jpl.nasa.gov/catalog/PIA21050

Aeronautics and Space Administration (NASA) Lewis Research Center. Aerojet General was contracted to design the SNAP-8 generator which employed a mercury Rankine system to convert the reactor’s heat into electrical power. The hermetically-sealed pump was designed to generate from 35 to 90 kilowatts of electrical power. In 1964 a SNAP-8 test rig with a mercury boiler and condenser was set up in cell W-1 of Lewis’ Engine Research Building to study the transients in the system’s three loops. In 1967 a complete Rankine system was operated for 60 days in W-1 to verify the integrity of the Lewis-developed mercury boiler. Further tests in 1969 verified the shutdown and startup of the system under normal and emergency conditions. Aerojet operated the first full-Rankine system in June 1966 and completed a 2500-hour endurance test in early 1969. Lewis and Aerojet’s success on the Rankine system was acknowledged with NASA Group Achievement Award in November 1970. The 1970 vibration tests, seen here, were conducted in Lewis’ Engine Research Building’s environmental laboratory. The testing replicated the shock and vibration expected to occur during the launch into space and subsequent maneuvering. The pump was analyzed on each of its major axes.

A section of the Centaur Standard Shroud transported to Nuclear Rocket Dynamics and Control Facility, or B-3 Test Stand, at the National Aeronautics and Space Administration’s (NASA) Plum Brook Station. B-3 was built in the early 1960s to test full-scale liquid hydrogen fuel systems in simulated altitude conditions. The facility was used in 1972, however, for testing of the Centaur Standard Shroud’s ejection system. In the late 1960s NASA engineers were planning the ambitious new Viking mission to send two rover vehicles to the surface of Mars. The Viking rovers were the heaviest payloads ever attempted and were over three times the weight of Atlas-Centaur’s previous heaviest payload. Consequently, NASA engineers selected the more powerful the Titan III rocket booster to mate with the Centaur. Concurrently, General Dynamics was in the process of introducing a new Centaur model for Titan—the D-1T. The biggest change for the D-1T was a completely new shroud designed by Lockheed, called the Centaur Standard Shroud. The shroud, its insulation, the Centaur ground-hold purge system, and the hydrogen tank venting system were all studied in B-3. After more than two years of preparations, the tests were run between April and July 1973. The tests determined the ultimate flight loads on two axes, established the Centaur’s load sharing, the level of propellant boiloff during launch holds, and the vent system capacity. The Centaur Standard Shroud performed flawlessly during the August 20 and September 9, 1975 launches of Viking 1 and 2.