[Machine Translation] A stone that flew to the earth from the sky. Its age is the age of the solar system, and it is the oldest object available to mankind. On the other hand, its research uses state-of-the-art equipment. Bridging the past and present, natural history and cutting-edge science, meteorites are the objects that we are looking for. This book covers the basics of meteorites, the history of their discovery, and the current state of cosmochemistry. The "Commentary" by Seiichi Yoneda of the National Museum of Nature and Science also provides supplementary information on meteorites in Japan.