Micrometeorite impacts refer to the collisions of small, extraterrestrial particles, known as micrometeorites, with planetary surfaces. These particles are typically less than 2 millimeters in size and can originate from comets, asteroids, or even interstellar space. When micrometeorites impact a planet or moon, they create tiny craters and can contribute to the erosion and weathering of the planetary surface. Studying micrometeorite impacts can provide valuable information about the frequency and nature of small impact events in our solar system, as well as insights into the geological history of planetary bodies.