The Growth of Physical Science

Alexandria algebra Anaxagoras Anaximander angles Archimedes Aristarchus Aristotle astronomy atomic weight Babylonians body circle color conic sections conjecture consisted Copernicus curve deflected Democritus Descartes direction discovered discovery distance doctrines earth eclipses electric electron elements ellipses emitted energy equal equation ether Euclid experiment explained force Galileo geometry gravitation Greek Hipparchus hydrogen ideas instance J. J. Thomson Kepler knowledge known later light lines magnetic mass mathematician mathematics matter measure mechanical methods molecules moon motion moving nature nebulae Newton object observed optics orbit particles philosopher physics planets Plato Plutarch position principle problem produced properties proton Ptolemy Pythagoras Pythagoreans quantity radiation radioactive rays refraction result rotation scientific seemed seen showed similar simple space speed sphere square stars Stevinus substances supposed surface T. L. Heath telescope temperature Thales theorem theory thought tion triangle universe waves