Astronomy 45 - Spring 1999
Introduction to Astrophysics

Professor Alex Dalgarno

Welcome to Astronomy 45- 1999. Below, you will find the lectures in Adobe's Portable Document Format (pdf).

The official website for Faculty of Arts and Sciences Courses for Spring '99 is located at FAS Courses.

Reading material for Spring '99:

Table of Contents
Chapter I
    An article on Pluto.
Chapter II
Chapter III
Chapter IV
    An article on two-body and three-body orbits.
         Effective gravitational potential that a small test mass m in the plane of the orbit of two large masses M₁ and M₂  experiences. The Lagrange points are the saddle points at which the centripetal and gravitational accelerations cancel.
   planetary orbital data
   Orbits of the planets are here and in expanded form
    Sun Statistics
    Earth Statistics
    A fascinating look at our Solar System, including views of the Sun, the planets and their moons, comets, and asteroids.
Chapter V 
     Polytropes: solutions of Lane-Emden equation for stellar density as a function of polytropic index, n.
Chapter VI
 

Study Problems for Mid-Term in both pdf format and in postscript format.