GALLERY OF SPACE SCIENCE POPULARIZED PUBLICATIONS

GRAVITY by Ben Patrusky (Nelson Doubleday, Inc - 1962) summarized the topic of gravity and related the subject to space exploration. Gravity is the force imparted by the earth to a mass on, or close to the earth. Since the earth is rotating, the force observed as gravity is the resultant of the force of gravitation and the centrifugal force arising from this rotation. (GLOSSARY OF FREQUENTLY USED SPACE TERMS: NASA publication SP-1)