UCLA courses rarely have notes or homework assignments posted on the internet (i.e. not on a private class site), so I didn’t have much hope when I checked one of these courses today. However, it seems I was lucky. The homework assignments for the course Astrophysics I, taught by Prof. Andrea Ghez, are available for everyone interested at http://ccle.ucla.edu/course/view/08W-ASTRO81-1. Only the first problem set was posted yet, but I suppose the rest will also be online pretty soon.
The other Physics/Astronomy courses offered at UCLA this Winter can be found at http://academics.physics.ucla.edu/classes/index.php, but unfortunately, at least until today, there was nothing posted on their public class sites.