The four astronauts on the Artemis 2 mission from Nasa performed a full launch day rehearsal on December 20, 2025, on Kennedy Space Center, on Flórida. Reid Wiseman, Victor Glover and Christina Koch, from Nasa, together with Jeremy Hansen, from
This exercise marked an important milestone in the final preparations for the mission, scheduled for no earlier than February 2026. The activity took place inside the Vehicle Assembly Building, where the Space Launch System rocket and the Orion are in the integration and testing phase.
The rehearsal validated the launch timeline, allowing ground teams and crew to practice critical steps in a controlled environment. Essa simulation contributes to ensuring safety and efficiency in the first manned mission to the lunar environment since Apollo 17, in 1972.
Assay procedures
The astronauts started the day wearing survival suits Orion in Neil A. Armstrong Operations and Checkout Building. They then left the building and boarded a special vehicle to simulate the transfer to the launch platform.
On Vehicle Assembly Building, the crew accessed the mobile launcher’s access arm from 275 feet in the air. Eles entered and exited the Orion capsule, mounted on top of the SLS, practicing internal configurations and communications checks.
- Spacesuit donning and checking
- Traditional exit from the building with patches from previous missions
- Simulated transfer and access to the tower elevator
- Board the Orion and countdown simulation until seconds before liftoff
These steps replicate exactly what will happen on the actual launch day, helping to identify possible adjustments.
Preparations for mission Artemis 2
Artemis 2 will be the first manned mission of the Artemis program, sending humans around Lua on a free return trajectory lasting around 10 days. The main objective is to test crewed Orion systems in a deep space environment, including life support and radiation protection.
The SLS rocket, the most powerful ever built, will propel the capsule together with the European service module. Equipes on Kennedy Space Center completed vehicle assembly in October 2025, allowing it to move towards integrated testing.
After this dry test, the wet dress test follows, which involves loading propellants into the rocket on the launch platform. Essas steps prepare vehicle rollout for Launch Complex 39B.
Crew and roles
Reid Wiseman serves as mission commander, with previous experience on expeditions to Estação Espacial Internacional. Victor Glover serves as a pilot, bringing expertise from spaceflight and operations on the ISS.
Christina Koch, mission specialist, holds the record for female stays in space and will contribute to scientific tests. Jeremy Hansen, the first Canadian on a lunar mission, completes the team as a specialist, reinforcing the international partnership.
Crew selection took place in 2023, with intense training since then, including emergency simulations and flight procedures.
Next steps in the Artemis program
With the rehearsal complete, Nasa moves on to final ground testing before launch in 2026. The mission paves the way for Artemis 3, which plans to land on the lunar surface, possibly in 2027 or later.
The Artemis program aims to establish a sustainable presence on Lua, with bases for scientific exploration and preparation for missions to Marte. Parcerias with international agencies and private companies expand technical capabilities.
Tests like this demonstrate progress in integrating complex hardware, developed by teams across Estados Unidos and Europa.
Technical details of the simulation
During the rehearsal, teams at Launch Control Center monitored the countdown, introducing simulated anomalies to practice responses. The crew configured Orion’s internal systems, checking communications and environmental controls.
The exercise stopped seconds before the simulated ignition point, as planned. Feedback of the crew indicated overall success, despite pauses for procedural resolution.
This practice reflects lessons from previous missions, such as the Apollo program and the space shuttle, adapted to modern technology.
Historical context of lunar exploration
Artemis 2 represents the return of humans to the lunar neighborhood after more than 50 years since the last Apollo mission. Essa voyage will test distant trajectories, taking the crew further from Terra than any previous human in the modern era.
The program integrates advances in propulsion, habitats and life support for long missions. Sucessos as well as Artemis 1, unmanned in 2022, validated the initial design of the SLS and Orion.
Current advances position Nasa for continued exploration, with a focus on resource-rich lunar polar regions.