Philosophy 1130F/G Lecture Notes - Lecture 5: Planetary System
9 Apr 2020
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Philosophy 1130 - week 5 : lecture notes. Gravity: gravity not just a terrestrial phenomenon. It is universal force by which all matter acts on all matter: the planetary system is an interacting system, there is a definite answer to the question of motion in the solar system. Deductive -- implies that explanation is a kind of deduction from given premises. Nomological -- implies that the given premises are universal or statistical laws of nature. The point -- that to explain an event, ideally, is to provide what suffices to deduce logically that the event must have occurred. If we know the laws of nature and all the conditions we should be able to predict what a person will do. Planets orbit the sun in ellipses with the sun at their common focus. Newton thought it was a myth that kepler proved this. The radius drawn from the sun to a planet sweeps out equal areas in equal times.
