Comets and Asteroids (Astronomy)

Recall cards on the small bodies of the solar system: asteroids and comets. The asteroid belt between Mars and Jupiter, the largest asteroids Ceres, Pallas, and Vesta, and the C-type, S-type, and M-type compositional classes. The spacecraft that visited and sampled asteroids: Galileo, NEAR-Shoemaker, Hayabusa, OSIRIS-REx, Dawn, and Lucy, plus the interstellar visitor 'Oumuamua. Near-Earth objects and planetary defense: the Tunguska and Chelyabinsk airbursts, the Spaceguard Survey, and the DART and Hera missions. The anatomy of a comet, its nucleus, coma, and tails, Fred Whipple's dirty snowball model, and famous comets such as Halley and 67P Churyumov-Gerasimenko explored by Rosetta and Philae. And the reservoirs that supply comets: the distant Oort cloud of long-period comets and the Kuiper belt beyond Neptune that feeds the short-period comets.