Describes the formation and surface features of asteroids, tells how scientists learn about asteroids, and discusses the search for asteroids that might possibly collide with Earth.
Discusses the rotation, interior, surface features, atmosphere, and exploration of the Sun, including solar wind and the Sun's place in the solar system.
Details astronaut John Glenn's second flight into space in 1998 and contrasts it with his first flight in 1962, discussing training, equipment, and responsibilities.