As part of the Artemis II mission, astronauts will closely observe the Moon during their flyby, relying heavily on their own eyesight to capture details that even modern imaging systems can struggle to interpret.
Why NASA Still Trusts the Human Eye
Despite decades of technological progress, NASA scientists say the human eye remains unmatched in certain areas of observation.
Kelsey Young, the mission’s lead scientist, emphasized that the eye’s ability to process color, contrast, and context in real time makes it uniquely valuable. Humans can instantly interpret how light interacts with the lunar surface—recognizing subtle variations in texture and shading that may not be easily captured in photographs.
This capability is especially important when studying how sunlight affects the Moon’s terrain. Changes in light angle can dramatically alter how features appear, revealing surface details like ridges, craters, and mineral differences.
Astronaut Victor Glover described the human eye as a “magical instrument,” highlighting its importance alongside onboard cameras.
Training Astronauts as Field Scientists
To prepare for the mission, the four-member crew underwent more than two years of intensive training designed to transform them into what NASA calls “field scientists.”
The team—commander Reid Wiseman, pilot Glover, mission specialist Christina Koch, and Canadian astronaut Jeremy Hansen—studied lunar geology, participated in field expeditions in places like Iceland and Canada, and practiced simulated Moon flybys.
A key part of their preparation involved memorizing the Moon’s “Big 15”—a set of prominent surface features used for orientation. Using models and simulations, they also trained to observe how sunlight alters the Moon’s appearance, sharpening their ability to make precise, real-time descriptions.
Observing the Moon Up Close
During the flyby, the Moon will appear surprisingly large—roughly the size of a basketball held at arm’s length, according to NASA scientists. This proximity offers a rare opportunity for astronauts to visually assess features such as color variations, which can provide clues about the Moon’s composition and geological history.
Scientists are particularly interested in whether astronauts can detect subtle hues—like browns or tans—on the lunar surface. These variations may reveal differences in minerals and past volcanic activity.
Science, Storytelling, and Human Perspective
While major discoveries are not necessarily expected—given the extensive data already gathered from probes and high-resolution imaging—experts say the human element remains invaluable.
For many on Earth, hearing astronauts describe the Moon in real time will be a unique experience not witnessed since the Apollo era. Their observations will combine scientific insight with a sense of immediacy and perspective that instruments alone cannot provide.
The mission will be broadcast live by NASA, allowing audiences around the world to follow the journey—except for brief periods when the spacecraft passes behind the Moon.
As anticipation builds, scientists remain confident that the crew will deliver not just data, but vivid descriptions that reconnect humanity with one of its most iconic frontiers.