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Asteroid: a large rocky body in space, in orbit around the Sun. Meteoroid: much smaller rocks or particles in orbit around the Sun. Meteor: If a meteoroid enters the Earthâs atmosphere and vaporizes, it becomes a meteor, which is often called a shooting star.Meteorite: If a small asteroid or large meteoroid survives its fiery passage through the Earthâs atmosphere and lands on Earthâs surface, it is then called a meteorite.Another related term is bolide, which is a very bright meteor that often explodes in the atmosphere. This can also be called a fireball.ummary. In short, the difference between asteroids and meteors all comes down to a question of location. Asteroids are always found in space. Once it enters an atmosphere, it becomes a meteor, and then a meteorite after it hits the ground.
The most common type of meteorite found on Earth, about 75% of those identified, are chondrites, stony bits of space rocks that didnât undergo any melting while out in space. Two astronomers say have determined that most of these meteorites come from the asteroid belt between Mars and Jupiter. Using the GEMINI telescope, they found that asteroids in that region are similar to chondrites found on Earth. This discovery is the first observational match between the most common meteorites and asteroids in the main belt. It also confirms the role of space weathering in altering asteroid surfaces. To find the parent asteroid of a meteorite, the astronomers compared the spectra of a meteorite specimen to those of asteroids. This is a difficult task because meteorites and their parent asteroids underwent different processes after the meteorite was ejected.