The most helpful space exploration activity in determining the age of the Moon has been the Apollo missions, specifically the Apollo 11, 12, and 16 missions. These missions brought back rock samples from the Moon, which were then analyzed in laboratories on Earth. By studying the chemical composition and dating the rocks using radiometric dating techniques, astronomers were able to determine that the Moon is approximately 4.5 billion years old. This crucial evidence from the Apollo missions has significantly contributed to our understanding of the Moon's age.
