A "Sample Return Mission" is a space exploration project designed to collect materials from celestial bodies, such as asteroids or moons, and bring them back to Earth for analysis. These missions help scientists study the composition, history, and potential for life on other planets, providing valuable insights into the solar system's formation. One notable example is the Mars Sample Return Mission, which aims to gather soil and rock samples from Mars and return them to Earth. This mission will enhance our understanding of the planet's geology and search for signs of past life, contributing to future exploration efforts.