Space.com reporter Josh Dinner is stationed at Kennedy Space Center to provide on-site coverage and insights about the rollout.

Improvements for Artemis II include an accessible flight termination system without returning to the VAB, and prior repairs to ML1 after Artemis I damage, including reinforced tower structures and emergency egress systems.

Crawler-Transporter 2 is the world’s heaviest self-powered vehicle, capable of carrying up to 18 million pounds, and has a 50-year lineage with upgrades over time.

Launch times shift about 40 minutes later each day due to Earth’s rotation and the Moon’s orbit, with gaps built for range conflicts and propellant resupply.

The crew consists of four astronauts—Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen—for a 10-day free-return lunar flyby to test Orion’s deep-space performance and life-support systems.

A key prelaunch milestone is the wet dress rehearsal, loading cryogenic propellant and practicing countdown to push systems to limits without crew, building on hydrogen-leak lessons from Artemis I.

Launch-day checks involve electrical and cryogenic connections and powering up flight systems to verify ground infrastructure, followed by a wet dress rehearsal with substantial propellant loading and unloading.

Final preparations include ground system integration, electrical and propulsion hookups, and a prelaunch wet dress rehearsal involving about 2.65 million liters (700,000 US gallons) of cryogenic fuel.

Artemis II, NASA’s first crewed mission to approach the Moon since 1972, is rolling out to Launch Complex 39B at Kennedy Space Center with the Orion spacecraft and SLS on its mobile launcher, in a roughly 12-hour rollout toward the pad.

Earlier issues such as a hatch pressurization valve and a ground-support leak were resolved in January, with ongoing tests of inter-system compatibility and ground-support equipment.

Details about the viewing window for the press conference and related coverage are provided in the article.

Upon arriving at the pad, teams will connect launch infrastructure, secure the vehicle, configure the emergency egress system, and perform pad tests including radio frequency checkouts (Pad P testing).