Meteorites are mostly pieces of rock, though a few are metal, that fall to Earth from space.
Meteorites tell us the story of solar system history from the formation of the planets to catastrophic impacts on Earth. Meteorite Sample Disk NASA has prepared a Meteortie Sample Disk for loan to educators to help students learn about the early history of the solar system. The disk contains six labeled meteorites embedded in a 15-cm plastic disk. To borrow the disk, educators must first attend a short certification briefing on secruity requirements and handling procedures. This is the same certification as for borrowing the Lunar Sample Disk.