Oort Cloud, Kuiper Belt, Comets, and Asteroids. Origin of the Kuiper Belt KBO’s up close (sort of) The Pluto Affair… Short period vs Long Period comets; origin in Kuiper Belt vs Oort Cloud The Asteroid Belt and its origin. The Oort Cloud.
Asteroid close encounters, and Jupiter’s gravity, have changed some orbits, creating a population of earth-crossing asteroids. Those that haven’t already hit us, probably will in the (hopefully distant) future, causing….Big Trouble!
Over 500 injured. This impact equivalent to 25 Hiroshima A-bombs. Didn’t do near as much damage because of lucky shallow trajectory, spent most of it’s energy high in the atmosphere