Large pieces that do not vaporize completely and reach the surface of the Earth are termed meteorites. Scientists estimate that 1,000 tons to more than 10,000 tons of meteoritic material falls on the Earth each day. They probably come from within our own solar system, rather than interstellar space. Their composition provides clues to their origins. They may share a common origin with the asteroids.
Some meteoritic material is similar to the Earth and Moon and some is quite different.
Some evidence indicates an origin from comets. In fact, some meteor showers occur annually or at rather regular intervals. The number is greater in autumn and winter. The number always increases after midnight and is usually greatest just before dawn. Perhaps the most famous are the Perseids which peak around August 12 every year.