Meteoroid: A solid piece found on the Moon and Mars.

A solid piece of debris from a target, such as a comet, meteoroid, or asteroid that originates in outside space and outlive its passage all the time the atmosphere to come to the surface of a moon or planet. When the actual object enters the atmosphere, drivers factors such as friction, chemical interactions, and pressure with the atmospheric gases cause it to emit energy and heat up.

It then set off a meteor and forms a fireball, also known as a falling star or shooting star, astronomers call the brightest examples, bodies. One time it settles on the larger body's surface, the meteor becomes a meteorite. Meteorite varies greatly in size. 

For a geologist, a bolide is a meteorite large enough to create an impact crater. Meteorites have been divided into three broad categories: stony meteorite that is rocks, iron meteorites, mainly composed of silicate minerals, that are largely composed of metallic iron-Nickell, and stony-iron meteorites that contain a large amount of both metallic and rocky material.

Modern classification schemes divided meteorites into groups according to their mineralogy, structure, isotopic composition, chemical. Extraterrestrial meteorites are many objects that have impacted other celestial bodies, whether or not they have passed through an atmosphere. They have been found on the moon and Mars.