Astronomy - Solar System - Oort Cloud - Comets

Comet Shoemaker-Levy 9 Impacts Jupiter + Animation Reel 1994 NASA
Halley's Comet Armada: "Comet Halley Returns-Voyager Uranaus Flyby" 1986 NASA (just the Comet section, part 1)

The Kingfisher Space Encyclopedia

Discussion:
Composition; Tail
Origin of comets
Shoemaker-Levy 9/Dinosaur extinction comets

Activity:
Draw a schematic of a comet

Astronomy - Solar System - Oort Cloud - Structure and Composition

The Kingfisher Space Encyclopedia

Discussion:
Outermost region of the solar system
Composition of the Oort Cloud

Activity:
Draw the Oort Cloud; explain distance from the Sun