Ejecta

Ejecta refers to the material that is expelled from a celestial body, such as a planet, moon, or asteroid, primarily during an impact event like a meteorite striking its surface. These are fragments of rock, dust, and other debris thrown outward at high speeds. Ejecta can reveal information about the object's surface and internal composition. For example, studying ejecta from lunar craters helps scientists understand the Moon's geology and impact history. Essentially, ejecta are the debris blast away from the site of a sudden, energetic event, providing valuable clues about planetary processes.