Playing Cosmic Billiards (or, How
to Change a Spacecraft's Speed and Direction): two page spread showing
Galileo's trajectory from launch through arrival at Jupiter, along
with small inset photos of Venus, Earth, asteroids Ida and Gaspra,
and the impact of Comet Shoemaker-Levy 9. Text explains how gravity
assists work, the type of rocket propellant used by the spacecraft,
and compares the fuel-efficiency of the gravity assists.