In the early solar system, an object roughly the size of Mars, dubbed Theia by scientists, struck the nascent Earth. The impact vaporized vast amounts of rock and ejected debris into space.
Some of this debris coalesced over time to form the Moon we observe today. This scenario accounts for the Moon’s low iron content and its isotopic similarity to terrestrial rocks.
Insights from this event inform current exploration efforts. NASA’s Artemis program aims to return humans to the lunar surface to establish a sustainable presence and test technologies needed for future Mars missions.
By studying lunar samples, researchers hope to learn more about the conditions of the Theia collision and improve our understanding of the early planetary system.