Members of the Artemis I launch team, including personnel with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs, monitor activities during the ninth formal terminal countdown simulation inside Firing Room 2 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Chief of the Test, Launch and Recovery Operations Branch within the Exploration Ground Systems (EGS) Program Jeremy Graeber monitors activities during the ninth formal terminal countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. Members of the Artemis I launch team include personnel with EGS and contractor Jacobs. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Members of the Artemis I launch team, including personnel with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs, monitor activities during the ninth formal terminal countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Members of the Artemis I launch team, including personnel with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs, monitor activities during the ninth formal terminal countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Members of the Artemis I launch team, including personnel with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs, monitor activities during the ninth formal terminal countdown simulation inside Firing Room 2 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Chief of the Test, Launch and Recovery Operations Branch within the Exploration Ground Systems (EGS) Program Jeremy Graeber, (left) and Artemis I Launch Director Charlie Blackwell-Thompson (right), along with members of the Artemis I launch team, including personnel with EGS and contractor Jacobs, monitor activities during the ninth formal terminal countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Artemis I Launch Director Charlie Blackwell-Thompson monitors activities during the ninth formal terminal countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. Members of the Artemis I launch team include personnel with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Members of the Artemis I launch team, including personnel with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs, monitor activities during the ninth formal terminal countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Artemis I launch team member Joshua Jones monitors activities during the ninth formal terminal countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on June 24, 2021. The Artemis I launch team includes personnel with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs. This is part of a series of simulations to help the team prepare for the launch of Artemis I, the uncrewed first flight of the Space Launch System rocket and Orion spacecraft.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Charlie Blackwell-Thompson, Artemis launch director, Exploration Ground Systems at NASA’s Kennedy Space Center in Florida, participates in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Jeremy Graeber, Artemis assistant launch director within NASA’s Exploration Ground Systems Program, participates in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025 at the agency’s Kennedy Space Center in Florida. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Teams at NASA’s Kennedy Space Center in Florida participate in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Charlie Blackwell-Thompson, Artemis launch director, Exploration Ground Systems at NASA’s Kennedy Space Center in Florida, participates in the first joint integrated launch countdown simulation for Artemis II inside Firing Room 1 of the Launch Control Center on Thursday, Sept. 11, 2025. The training exercise involved engineers from Kennedy, Marshall Space Flight Center in Huntsville, Alabama, and Johnson Space Center in Houston coming together to rehearse all aspects of the launch countdown, from cryogenic loading – filling tanks in the SLS (Space Launch System) rocket’s core stage with liquid hydrogen and liquid oxygen – to liftoff. These simulations will help certify that the launch team is ready for Artemis II – the first crewed Artemis mission that will send four astronauts around the Moon and back.

Artemis launch team members participate in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Charlie Blackwell-Thompson, Artemis II launch director, participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Alora Mazarakis, Artemis launch team member, participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Madison Schmaltz, Artemis launch team member, participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Kevin Todaro, Artemis launch team member, participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

From left to right, Artemis launch team members Emily Eilish, Clare Hadley, and Holly Wells participate in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Charlie Blackwell-Thompson, Artemis II launch director, participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Charlie Blackwell-Thompson, Artemis II launch director, participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

An Artemis launch team member participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Charlie Blackwell-Thompson, Artemis II launch director, participates in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

An American flag displays inside Firing Room 1 of the Rocco A. Petrone Launch Control Center while members of NASA’s Exploration Ground Systems participate in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, at NASA’s Kennedy Space Center in Florida. The terminal count simulation runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

From left, Dan Florez, NASA test director, and Lili Villarreal, Artemis II landing and recovery director, participate in the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Members of NASA’s Exploration Ground Systems team pose for a photograph following the completion of the Artemis II terminal count simulation on Wednesday, Jan. 14, 2026, inside Firing Room 1 of the Rocco A. Petrone Launch Control Center at NASA’s Kennedy Space Center in Florida. The terminal count simulation conducted by NASA’s Exploration Ground Systems team runs through the final five hours of launch countdown, include terminal count - the remaining 10 minutes of the countdown - for NASA’s Artemis II test flight which will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than no later than April 2026 from Launch Complex 39B at NASA Kennedy.

Mike Guzman, main propulsion systems engineer participates in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

An Artemis launch team member participates in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

From left, Joe Pavicic, operations project engineer, and Mike Guzman, main propulsion systems engineer participate in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

An Artemis launch team member participates in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

John Blevins, SLS (Space Launch System) rocket chief engineer, participates in an Artemis II launch countdown simulation inside Firing Room 2 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

From left, John Honeycutt, Artemis II mission management team chair and Matthew Ramsey, Artemis II mission manager with NASA’s Exploration Systems Development Mission Directorate, participate in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

An Artemis launch team member participates in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Jeremy Graeber, Artemis assistant launch director within NASA’s Exploration Ground Systems Program, participates in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Joe Pavicic, operations project engineer within the Exploration Ground Systems Program, participates in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Charlie Blackwell-Thompson, Artemis launch director with the Exploration Ground Systems Program at NASA’s Kennedy Space Center in Florida, participates in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA Kennedy on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Artemis launch team members participate in an Artemis II launch countdown simulation inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Nov. 5, 2025. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. For Artemis II, four astronauts will venture around the Moon, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

KENNEDY SPACE CENTER, FLA. -- ASTP crewman Thomas Stafford is suited up for the Countdown Demonstration Test. The test, a step-by-step dress rehearsal for the July 15 luanch, will culminate in a simulated T-zero and launch. Yesterday the 'wet' portion of the test was conducted with the vehicle fueled as it will be on launch day. The fuels were offloaded and the terminal portion of the count repeated with the prime crew aboard the spacecraft.

Members of the Artemis launch team pose for a holiday group photo in Firing Room 2 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Thursday, Dec. 12, 2024. Teams participated in a cryogenic and terminal count simulation for Artemis II. The simulations go through launch day scenarios to help launch team members test software and make any necessary adjustments during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team participate in the Artemis II Terminal Count Simulation #11 inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Thursday, Nov. 7, 2024. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team pose for a holiday group photo in Firing Room 1 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Dec. 11, 2024. Teams participated in a cryogenic and terminal count simulation for Artemis II. The simulations go through launch day scenarios to help launch team members test software and make any necessary adjustments during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Charlie Blackwell-Thompson, Artemis launch director, Exploration Ground Systems at NASA’s Kennedy Space Center in Florida, participates in the Artemis II Terminal Count Simulation #11 inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy on Thursday, Nov. 7, 2024. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team pose for a holiday group photo in Firing Room 1 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Thursday, Dec. 12, 2024. Teams participated in a cryogenic and terminal count simulation for Artemis II. The simulations go through launch day scenarios to help launch team members test software and make any necessary adjustments during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team participate in the Artemis II Terminal Count Simulation #11 inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Thursday, Nov. 7, 2024. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Mari Forrestel, Artemis launch director technical assistant, Exploration Ground Systems at NASA’s Kennedy Space Center in Florida, participates in the Artemis II Terminal Count Simulation #11 inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy on Thursday, Nov. 7, 2024. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Charlie Blackwell-Thompson, Artemis launch director, Exploration Ground Systems at NASA’s Kennedy Space Center in Florida, participates in the Artemis II Terminal Count Simulation #11 inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy on Thursday, Nov. 7, 2024. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team participate in the Artemis II Terminal Count Simulation #11 inside Firing Room 1 in the Launch Control Center at NASA’s Kennedy Space Center in Florida on Thursday, Nov. 7, 2024. The simulations go through launch day scenarios to help launch team members test software and make adjustments if needed during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team pose for a holiday group photo in Firing Room 2 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Dec. 11, 2024. Teams participated in a cryogenic and terminal count simulation for Artemis II. The simulations go through launch day scenarios to help launch team members test software and make any necessary adjustments during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team pose for a holiday group photo in Firing Room 1 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Wednesday, Dec. 11, 2024. Teams participated in a cryogenic and terminal count simulation for Artemis II. The simulations go through launch day scenarios to help launch team members test software and make any necessary adjustments during countdown operations. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Charlie Blackwell-Thompson, Artemis launch director, Exploration Ground Systems, participates an Artemis II Terminal Count Simulation in Firing Room 1 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Friday, Dec. 6, 2024. Teams practiced running through the last hours of launch countdown as part of an integrated ground systems test the Exploration Ground Systems team is undergoing to prepare for Artemis II. This particular operation focused on testing the updated launch control system software the Artemis launch team uses to launch the SLS (Space Launch System) rocket and Orion spacecraft. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team participate in an Artemis II Terminal Count Simulation in Firing Room 1 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Friday, Dec. 6, 2024. Teams practiced running through the last hours of launch countdown as part of an integrated ground systems test the Exploration Ground Systems team is undergoing to prepare for Artemis II. This particular operation focused on testing the updated launch control system software the Artemis launch team uses to launch the SLS (Space Launch System) rocket and Orion spacecraft. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team participate in an Artemis II Terminal Count Simulation in Firing Room 1 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Friday, Dec. 6, 2024. Teams practiced running through the last hours of launch countdown as part of an integrated ground systems test the Exploration Ground Systems team is undergoing to prepare for Artemis II. This particular operation focused on testing the updated launch control system software the Artemis launch team uses to launch the SLS (Space Launch System) rocket and Orion spacecraft. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.

Members of the Artemis launch team participate in an Artemis II Terminal Count Simulation in Firing Room 1 inside the Launch Control Center at NASA’s Kennedy Space Center in Florida on Friday, Dec. 6, 2024. Teams practiced running through the last hours of launch countdown as part of an integrated ground systems test the Exploration Ground Systems team is undergoing to prepare for Artemis II. This particular operation focused on testing the updated launch control system software the Artemis launch team uses to launch the SLS (Space Launch System) rocket and Orion spacecraft. Four astronauts will venture around the Moon on Artemis II, the first crewed mission on NASA’s path to establishing a long-term presence for science and exploration through Artemis.