Meteorites: Nature’s Free Sample Return
What Meteorites Teach Us About the Solar System—and Humanity’s Future in Space By Dr. John Christy Johnson, Dr. Peter Anto Johnson, Dr. Austin Mardon, and Burt Dicht (see About the Authors at end of article) Image: A lunar meteorite from Antarctica, Allan Hills A81005. Image Credit: NASA/JSC S82-35869. Long before spacecraft visited the Moon, landed on asteroids, or returned samples from distant worlds, scientists were already studying material from beyond Earth. These extraterrestrial rocks, meteorites have often been described as the “poor man’s space probe” because they provide direct physical evidence from space without the expense and technological complexity of launching a spacecraft. Missions such as Apollo, Hayabusa2, and OSIRIS-REx have transformed our understanding of the Solar System. Yet meteorites remain among the most valuable scientific resources available for studying its origin, evolution, and composition. They preserve evidence from the earliest stages of planetary formation, record geological processes that occurred billions of years ago, and provide informati