The crew of Artemis II is returning home after a historic journey that provided them with an unparalleled view of the moon. Canadian Space Agency astronaut Jeremy Hansen, along with NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, set a new record by venturing farther from Earth than any humans ever have as part of 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 regions with their own eyes. NASA’s Artemis II lunar science lead, Kelsey Young, expressed excitement about the opportunity for the crew to see and describe lunar features firsthand.
During a five-hour observation period, the astronauts used cameras and the naked eye to make detailed observations. They focused on areas like the Orientale basin, a region believed to have formed 3.8 billion years ago, and noted color variations extending towards the Hertzsprung crater on the moon’s far side.
It may seem surprising, but the moon does exhibit colors that can be seen by enhancing saturation in photographs. These colors result from the diverse minerals present on the lunar surface. However, the human eye, being more sensitive than a camera, can discern subtle differences without the need for saturation adjustments.
Ralph Chou, a professor emeritus at the University of Waterloo, highlighted the human eye’s superior ability to detect color and brightness variations compared to electronic systems. He emphasized that the eye’s photoreceptors and visual system enhance the perception of differences, a capability that machine vision lacks.
Furthermore, humans viewing the moon’s features in real-time and in 3D provide additional advantages. During the lunar flyby, one fascinating observation was meteoroids striking the moon’s surface. Unlike on Earth, where most meteors burn up in the atmosphere, the moon’s lack of atmosphere allows meteoroids to reach the surface, resulting in its heavily cratered landscape.
The crew observed impact flashes caused by meteoroids, with NASA science lead Young expressing joy at the discovery. This direct human observation offers a unique opportunity to witness transient events that cameras may not capture due to their faster shutter speeds. The crew’s visual descriptions of the moon’s features during the flyby were described as stunning, providing valuable scientific insights when combined with camera observations.
In summary, the Artemis II mission has not only broken records in human space exploration but has also showcased the invaluable role of human observation in enhancing our understanding of celestial bodies like the moon.