Why are there two high tides a day? This lecture examines tides caused
by the differences in the gravity force of the Moon from one side to the
other of the Earth (stronger on the side nearest the Moon, weaker on the
side farthest from the Moon). The Sun raises tides on the Earth as
well, about half as strong as Moon tides, giving rise to the effect of
Sp ... Show More
Oct 2007
Lecture 17: On the Shoulders of Giants: Isaac Newton and the Laws of Motion
Copernicus, Kepler, Tycho, and Galileo together gave us a new way of
looking at the motions in the heavens, but they could not explain why
the planets move they way the do. It was to be the work of Isaac Newton
who was to sweep away the last vestiges of the Aristotelian view of t ... Show More
44m 47s