A meteoroid is a small rocky or metallic body in outer space. These objects are typically smaller than asteroids and can range in size from tiny grains to objects several meters wide. When a meteoroid enters the Earth's atmosphere, it heats up due to friction and creates a bright streak of light known as a meteor. If it survives the journey and lands on Earth, it is called a meteorite. Meteoroids can originate from various sources, including the debris left behind by comets or fragments from asteroids. They play a significant role in our understanding of the solar system's history and composition. Studying meteoroids helps scientists learn more about the formation of planets and the materials that make up celestial bodies.