The chance of finding a lunar or martian meteorite is even smaller Even when a meteorite is observed to fall, experienced meteorite hunters may find only a few stones when hunting dawn to dusk for a week. Only 137 of those occurred in North America.
![picture of a meteoroid picture of a meteoroid](https://img.xcitefun.net/users/2013/11/341973,xcitefun-amusement-park-japan-9.jpg)
Moving about 1 inch (2.5 centimeters) per second through the atmosphere, they don't experience the intense friction that larger meteoroids do. They don't get vaporized because they are light enough that they slow down very easily. So how big does a meteoroid have to be to make it to the surface of the Earth? Surprisingly, most of the meteoroids that reach the ground are especially small - from microscopic debris to dust-particle-size pieces. The friction breaks the molecules of both the meteoroid material and the atmosphere into glowing ionized particles, which then recombine, releasing light energy to form a bright "tail." A meteor tail caused by a grain-sized meteoroid is a few feet wide (about a meter) but, because of the high speed of the debris, may be many miles long. This friction generates enough heat (up to 3,000 degrees Fahrenheit, or 1,649 degrees Celsius) to raise the meteoroid's surface to its boiling point, so the meteoroid is vaporized, layer by layer.
#Picture of a meteoroid full
Earth's atmosphere, on the other hand, is full of matter, which creates a great deal of friction on a traveling object. They can travel at this rate very easily in the vacuum of space because there's nothing to stop them. Meteoroids enter the atmosphere at extremely high speeds - 7 to 45 miles per second (11 to 72 kilometers per second).
![picture of a meteoroid picture of a meteoroid](https://www.nottingham.ac.uk/PressReleaseLongForm-Images/MHS/Rabbit-3-moderately-flat.xa80ff71f.png)
![picture of a meteoroid picture of a meteoroid](https://img2.grunge.com/img/uploads/2016/02/darthvaderrogueonebadfeatured.jpg)
So how can we see a meteor caused by such a small bit of matter? It turns out that what these meteoroids lack in mass they make up for in speed, and this is what causes the flash of light in the sky. This dust tends to be made up of small particles. But most of the debris the Earth comes in contact with is "dust" shed by comets traveling through the solar system. They include any space debris bigger than a molecule and smaller than about 330 feet (100 meters) - space debris bigger than this is considered an asteroid.