【中国新闻网】嫦娥六号月壤最新研究修正月球“时间标尺”

Core Viewpoint - Chinese scientists have made significant progress in lunar research by revising the long-standing lunar impact crater chronology model, confirming that the impact flux on the moon's front and back sides is essentially consistent, which provides a more accurate "time scale" for lunar studies [4][5][6]. Group 1: Research Findings - The study, published in the journal "Science Advances," was conducted by scientists from the Chinese Academy of Sciences and involved the analysis of samples returned by the Chang'e 6 mission [4]. - The research established a new impact crater chronology model by correlating isotopic ages of returned samples with the density of impact craters in the sampling area, addressing long-standing debates regarding the moon's early impact history [4][5]. - The analysis of samples from the South Pole-Aitken (SPA) basin revealed young basalt dated at approximately 2.807 billion years and ancient rock at 4.25 billion years, providing critical "anchors" for understanding the moon's early history [4]. Group 2: Methodology and Results - The research team utilized high-resolution remote sensing images to statistically analyze the density of impact craters larger than 1 kilometer in the Chang'e 6 landing area and the entire SPA basin, integrating historical lunar exploration data [5]. - The results indicated a high degree of consistency in impact crater density between the moon's front and back sides, laying the groundwork for a global impact crater chronology model [5]. - The revised model suggests that the early impact events on the moon occurred in a smooth decline rather than through a period of intense turmoil, providing new insights into the moon's early impact history [6].