Lunar impacts show gradual decline, not single burst

🔑 Enhanced Key Takeaways

• •The Chang'e-6 mission successfully returned approximately 1,935 grams of lunar soil from the South Pole-Aitken basin, the largest and oldest impact crater on the Moon.
• •Researchers utilized high-precision U-Pb (Uranium-Lead) dating on impact-melted glass beads found within the regolith to establish a precise chronology of bombardment events.
• •The data indicates that the impact flux in the inner solar system has been relatively stable or slowly declining since the formation of the South Pole-Aitken basin roughly 4 billion years ago.
• •This study challenges the 'cataclysm' model which posited a spike in asteroid impacts approximately 3.9 billion years ago, suggesting instead a more continuous geological evolution.
• •The findings provide critical constraints for planetary formation models, implying that the early solar system's dynamical instability may have concluded earlier than previously estimated.

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