The Artemis II team is on their way back after an extraordinary moon viewing experience. Canadian Space Agency astronaut Jeremy Hansen and NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch achieved a significant milestone by venturing farther from Earth than any previous humans during the Artemis II mission.
While satellites have captured images of the moon’s far side since 1959, the Artemis II mission marked the first time humans directly observed certain far-side areas. Kelsey Young, NASA’s Artemis II lunar science lead, expressed excitement about having humans witness and describe lunar features firsthand.
During a media briefing, Young highlighted the ability of well-trained astronauts to make detailed color observations with their eyes in just a moment. The crew spent five hours observing the moon using cameras and their naked eyes, providing thorough descriptions of what they saw.
A prominent area of interest was the Orientale basin, believed to have formed 3.8 billion years ago. Hansen pointed out color variations extending towards Hertzsprung, a large crater on the moon’s far side, describing brownish and greenish hues in the region.
Although it may seem unusual, the moon does exhibit color, visible through photographs by enhancing saturation. Different colors on the lunar surface result from various minerals. The human eye surpasses cameras in sensitivity, requiring no saturation adjustments.
Ralph Chou, a professor emeritus at the University of Waterloo, explained that the visual system is more discerning than electronic systems, especially in detecting subtle color and brightness differences. Additionally, human observers benefit from real-time, 3D views of lunar features.
One intriguing observation during the lunar flyby was meteoroids impacting the moon’s surface. Unlike Earth, where most meteors burn up in the atmosphere, the moon’s lack of atmosphere allows meteoroids to reach the surface, creating its heavily cratered terrain.
Glover reported seeing impact flashes during the flyby, highlighting the advantage of human observers in witnessing transient events that cameras may miss. The ability to capture these events in real-time was emphasized as a significant advantage of human observations.
While cameras are valuable for studying surface features, combining visual observations with camera data enhances our understanding of the moon. The crew’s detailed accounts of the lunar flyby were lauded by NASA’s chief exploration scientist, underscoring the scientific value of their observations.
The Artemis II mission has provided valuable insights into our celestial neighbor, showcasing the unique perspective and contributions of human observers in space exploration.