Most are unchanged since their formation in the solar nebula are common in asteroids and comets.
The asteroid belt, a region of the solar system between Mars and Jupiter, is where asteroids are most frequently found. The first asteroids were not found until the beginning of the nineteenth century; they are too small to be seen without a telescope.
A number (corresponding to the order of discovery) and occasionally a name are assigned to asteroids. At first, goddesses from Greek and Roman mythology were used to name asteroids. Astronomers turned to the names of colleagues (and other notable people) they wished to honor after exhausting these and other female names (including, later, those of spouses, friends, flowers, cities, and others). For instance, Morrison, Fraknoi, and Sidneywolff are the names of asteroids 2410, 4859, and 68448 respectively.
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