Micrometeorites are small particles that are typically less than a millimeter in size and originate from outer space. They are also referred to as cosmic dust, interstellar particles, and space debris. These synonyms describe the same concept of extraterrestrial material that enters the Earth's atmosphere and lands on its surface. Furthermore, micrometeorites are sometimes classified as meteoroids, meteorites, or asteroids depending on their origin and size. They can also be called micrometeors or interplanetary dust particles (IDPs). Scientists study micrometeorites to learn about the history of the solar system and the formation of planets. Overall, there are many apt synonyms for the term "micrometeorites," each describing this fascinating realm of space debris.