A: Most meteors that enter the Earth's atmosphere are pieces of asteroids from the asteroid belt. The meteors were formed more than 4 billion years ago during what is thought to be the early stages of the solar system. read more
The solar system formed when a cloud of interstellar dust and gas collapsed. The oldest meteorite specimens are remnants of the very first geologic processes to occur in our solar system 4.6 billion years ago. read more