In a groundbreaking discovery, researchers have unveiled new insights into the Moon’s far side by analyzing samples collected during China’s Chang’e-6 mission. This mission marked the first time nearly 2kg of geological samples from the Moon’s far side were brought back to Earth, providing an unprecedented opportunity to study this remote region. The findings, published in two studies on November 15 in Science and Nature, offer valuable evidence of volcanic activity that persisted on the Moon for billions of years, painting a detailed picture of its ancient geological history.
Dr. Qiu-Li Li, a researcher at the Chinese Academy of Sciences, co-authored a study published in Nature that emphasizes the importance of these findings. The samples reveal clues about prolonged volcanic activity on the lunar far side, along with distinct sources within the Moon’s mantle. These discoveries are pivotal, as they challenge previous understandings of lunar geology, suggesting that volcanic processes on the Moon were much more active and widespread than previously thought. The Chang’e-6 mission, which is China’s second exploration of the far side following the Chang’e-4 mission in 2019, landed in the South Pole-Aitken Basin—an ancient lunar impact site dating back roughly four billion years.
The samples retrieved by the Chang’e-6 spacecraft included a variety of fine dust particles, ranging in size from just 1 micrometer to hundreds of micrometers. According to Dr. Yi-Gang Xu, a petrologist at the Chinese Academy of Sciences and co-author of a separate study published in Science, these particles provide a mix of materials from various geological periods. The dust reflects the history of the Moon’s surface, shaped by continuous micrometeorite bombardment and the effects of solar wind over time, which have helped scatter and deposit these particles across the lunar surface.
This research opens new doors to understanding the Moon’s geological processes and its history of volcanic activity, offering a glimpse into its dynamic past. The Chang’e-6 mission’s success in bringing back samples from such an unexplored area provides invaluable data that could change how scientists view the Moon’s evolution. With this new information, experts are now better equipped to unravel the mysteries of the Moon’s far side, offering fresh insights into the broader processes that shaped not only the Moon but also the other celestial bodies in our solar system.