TY  - BOOK
AU  - Phelan,Glen
TI  - An invisible force: the quest to define the laws of motion 
T2  - Science quest
SN  - 9780792255390
AV  - QC133.5 .P54 2006
U1  - 531/.112 22
PY  - 2006///
CY  - Washington, D.C.
PB  - National Geographic
KW  - Motion
KW  - History
KW  - Juvenile literature
KW  - sears
N1  - Includes index; Stargazing & heresy -- Picking up the pace -- On the shoulders of giants -- Newton's masterpiece -- From Newton to spaceflight; 5.5; Follett Library Resources; 5-8; Follett Library Resources; 5-8
N2  - Traces the historical and scientific path to understanding the laws of motion and gravity, and examines the discoveries of scientists including Copernicus, Galileo, and Isaac Newton
ER  -