Twenty-Fifth Lecture on Basic Astronomy

Twenty-Fourth Lecture from 2010 for Basic Astronomy

Twentieth Lecture from Fall 2009 for Basic Astronomy

Seventeenth Lecture on Basic Astronomy

Fourteenth Lecture from Fall 2009 for Basic Astronomy

Seventh Lecture from 2010 for Basic Astronomy

Overview of a Basic Astronomy Course

Twenty-Second Lecture from 2010 for Basic Astronomy

Twenty-Second Lecture from Fall 2009 for Basic Astronomy

Sixteenth Lecture on Basic Astronomy

Fourteenth Lecture from 2010 for Basic Astronomy

Fourteenth Lecture on Basic Astronomy

Eleventh Lecture from Fall 2009 for Basic Astronomy

In-depth Look at the Third Lecture on Basic Astronomy

Third Lecture on Basic Astronomy

In-depth Look at the Second Lecture on Basic Astronomy

Tenth Chapter of a Basic Astronomy Course

Syllabus for a Basic Astronomy Course, Fall 2010

Twenty-Fourth Lecture Part A from Fall 2009 for Basic Astronomy

Twenty-Third Lecture on Basic Astronomy

Twenty-First Lecture from Fall 2009 for Basic Astronomy

Fifteenth Lecture on Basic Astronomy

Fifth Lecture from 2010 for Basic Astronomy

Eighteenth Lecture on Basic Astronomy