Nine experiments and 17 activities are presented in this handbook. The experiments are related to the earth's size and orbit, Piton height, telescope operations, Mars and Mercury orbits, stepwise approximation, and models of comet orbits. Further naked-eye observations in astronomy are designed in connection with the sun, moon, and planet positions. The activities are concerned with sunspots, Foucault pendulum, three-dimensional orbits, satellite and comet orbits, Galileo's work, forces on a pendulum, angular measurements, analemma, epicycles, retrograde motions, armillary sphere, sidereal days, scale model of the solar system, and summary of physics learning in the Japanese haiku form. Self-directed instruction, demonstrations, and construction projects are stressed in these activities. The four chapters in the handbook are arranged to correspond to the text materials, with complete instructions in each experiment. Some experiments and activities are suggested for assignment, and the remaining are used at student discretion. Besides illustrations and film loop notes for explanation use, a table of planet longitudes, a guide for planet and eclipse observations, and a set of review problems are included. Additional suggestions for activities are given in the appendix. The work of Harvard Project Physics has been financially supported by: the Carnegie Corporation of New York, the Ford Foundation, the National Science Foundation, the Alfred P. Sloan Foundation, the United States Office of Education, and Harvard University. (CC)