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They have been found on the Moon usually a nearby town or geographic feature.
Modern classification schemes divide meteorites into groups according to their structure, chemical and isotopic composition and mineralogy.
Meteorites smaller than 2 mm are classified as micrometeorites.
Extraterrestrial meteorites are such objects that have impacted other celestial bodies, whether or not they have passed through an atmosphere.
If the meteoroid maintains a fixed orientation for some time, without tumbling, it may develop a conical "nose cone" or "heat shield" shape.
As it decelerates, eventually the molten surface layer solidifies into a thin fusion crust, which on most meteorites is black (on some achondrites, the fusion crust may be very light colored).