从星际空间坠落入地球表面的陨石是研究原始太阳星云的形成和演化的难得样品。在近20年内发展迅速的陨石学已成为探索宇宙空间的有力武器。 本文介绍用铀铅法测定安徽毫县陨石的形成年龄,其结果表明它与地球的年龄一样。 Meteorites that fall from the interplanetary space into the Earth’s surface are rare examples of the formation and evolution of the original solar nebula. The rapid development of meteorology in the past 20 years has become a powerful weapon for exploring space. This article describes the determination of the age of formation of the Mexian meteorite using the uranium-lead method. The results show that it is the same as the Earth’s age.