NASA’s Artemis II crew has officially crossed the two-thirds mark of their journey to the Moon, confirming the completion of a critical correction burn on Flight Day 5. Following a successful launch from Kennedy Space Center on April 1, the four-person crew—Jeremy Hansen, Reid Wiseman, Christina Koch, and Victor Glover—is now deep into the transit phase of their 10-day mission.
The Precision of the Correction Burn
Although the initial Translunar Injection (TLI) burn provided the raw velocity needed to escape Earth’s orbit, the Flight Day 5 correction burn serves as the mission’s fine-tuning mechanism. In deep space navigation, even a fractional deviation in trajectory can result in missing the lunar target by hundreds of miles. By executing this burn, the crew ensures Orion is perfectly aligned for its trajectory around the far side of the Moon.
This phase of the mission follows the high-energy start on Flight Day 2, where Orion’s main engine fired for five minutes and 50 seconds. That burn utilized approximately 1,000 pounds of fuel to push the 58,000-pound spacecraft toward the Moon, generating up to 6,700 pounds of thrust.
The mission is now transitioning from the “push” phase to the “approach” phase, with the crew sharing fresh lunar images as the Moon grows larger in the spacecraft’s view.
Technical Context: Translunar Injection (TLI)
TLI is the maneuver that accelerates a spacecraft from Earth orbit to a trajectory that will intersect the Moon’s orbit. For Artemis II, this required a precise 5-minute and 50-second burn of the Orion main engine, essentially “throwing” the capsule toward a specific point in space where the Moon will be in several days.
Combatting Deep Space Atrophy
Beyond the orbital mechanics, the mission is a live test of human endurance hardware. As the crew lacks the massive exercise suites found on the International Space Station—which occupy roughly 850 cubic feet and weigh over 4,000 pounds—they are relying on a compact flywheel exercise device.

This cable-based system operates like a yo-yo, providing resistance proportional to the force applied. It allows the crew to perform both aerobic rowing and resistive movements, including deadlifts and squats, with loads up to 400 pounds. Ground teams are currently monitoring how these physical activities impact the spacecraft’s movement and the performance of the air revitalization system, which must maintain a breathable cabin environment while the crew exerts themselves.
Bridging the Gap via AROW
For the public, the mission’s progress is being translated through the Artemis Real-time Orbit Website (AROW). This tool moves beyond simple telemetry, offering real-time data on Orion’s speed, altitude, and distance from both Earth and the Moon.
The mobile integration of AROW is particularly notable for its augmented reality (AR) feature, allowing users to point their smartphones at the sky to see Orion’s relative position. This data is fed directly from sensors on the spacecraft to the Mission Control Center at NASA’s Johnson Space Center in Houston, effectively turning a deep-space voyage into a transparent, real-time data stream.
The Path to 2028
Artemis II is not a landing mission, but a critical validation of the systems required to get humans back to the lunar surface. The 10-day flight will conclude with a splashdown off the coast of California, providing the final data set needed to pave the way for a crewed moon landing as early as 2028.
Mission Quick-Take
Where is the crew now? They have passed the two-thirds mark of their journey and completed a Flight Day 5 correction burn.
How can the public track them? Through the AROW website and the NASA mobile app, which includes an AR tracking feature.
What is the finish goal of this specific flight? To test deep space systems and crew endurance before a planned moon landing in 2028.
As the crew prepares for the final leg of the journey toward the far side of the Moon, will the data from the flywheel and air revitalization tests fundamentally change how NASA designs the interiors of future long-duration deep space habitats?








