HI JRMoran,
I am not doing the OU course but I have found these two other courses on the on the internet and I thought they might be useful. Both are complete and free amazingly. All the materials are there, lecture notes, course notes, course work etc but of course you don't get marked, any certificate or any help.
The two courses are;
Astronomy 161 at Ohio State UniversityNot only do you get all the materials but the lectures are available as a podcast
http://www.astronomy.ohio-state.edu/~pogge/Ast161/Lectures podcast at
http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=192740136
8.282J / 12.402J Introduction to Astronomy from MIThttp://ocw.mit.edu/OcwWeb/Physics/8-282JSpring-2006/CourseHome/index.htmCurrently I am following the Astronomy 161 course (I am just listening at the moment). It is very thorough although maybe a little laboured particularly if you already know some of the stuff. Note that the fist lecture is on metric measurement - don't let this put you off remember our American cousins still use the FPS system and haven't generally haven't a clue about metric

It soon picks up pace.
The main sections of Astronomy 161 are;
Part I: The Starry NightUnit 1: Introduction
Unit 2: Discovering Earth & Sky
Part II: The Rise of Modern AstronomyUnit 3: The Revolutions of the Heavenly Orbs
Unit 4: The Laws of Nature: Gravitation, Matter, & Light
Part III: The Family of the SunUnit 5: The Earth & The Moon
Unit 6: The Family of the Sun