Dear Professor,

You're skipping over many vitally important bits of information. For example, how exactly is stellar spectra taken. How is it performed and where are the results recorded? There is just too much information missing between the slides. Also, please try to speak more clearly -don't mumble or let your voice trail off toward the end of some of your sentences. Thanks!

Lessons contents are incomplete and quizzes are clearly above the level of the lessons. Don't know if I'm learning anything. I quit and will look to other alternatives as I don't want to waste more time and effort on it.

No real interaction, it's like sitting on the outside of a lecturer through an open window.....

Lectures are quite interesting, but the numerical exercises are a shit there is no way to really know how to put correctly the numbers, in spyte you could obtail the correct resultin your calculator. For that reason i will not recomend to take this course. REALLY BAD!!!!

En los cuestionarios, seleccionaba las respuestas correctas pero en la segunda pregunta no me contaba como buena (Aun y cuando salia la paloma verde), provocando la falta de ese punto.

The difficulty contradicts Courseras slogan "education for everyone"

Too difficult for the non-science minded.

It's useless and lacking enthusiasm.