I teach several courses at RIT, both at the introductory, survey level, and at a more advanced level for students who have taken a couple of years of physics and math. All my course material is already available freely. The astronomy courses are

(intro level) Stellar Astronomy
http://spiff.rit.edu/classes/phys230/phys230.html

(intro level) Extragalactic Astronomy (a bit out of date, alas)
http://spiff.rit.edu/classes/phys240/phys240.html

(a bit more math) Astronomy for science majors
http://spiff.rit.edu/classes/phys301/phys301.html

(lots and lots of math and calculus) Stellar Astrophysics
http://spiff.rit.edu/classes/phys440/phys440.html

Observational Astronomy
http://spiff.rit.edu/classes/phys445/syllabus.html

People are welcome to use bits and pieces, as long as they honor the Creative Commons License.

Enjoy!

Michael Richmond