This class was tough.
The instructor actually wrote the book used in the course. He works at NASA, has been a pioneer in the field of astronomy for a number of years, and really knows what he is talking about in great detail. There is no fooling your way through this course. Because the instructor is so knowledgeable, it forces you to study hard and produce your best work each week.
One of the things that sticks in my head about this course is how much devastation a 1 Km asteroid impacting the Earth traveling at 20 K/S would create. This explosion would be equal the force of a few thousand Hiroshima nuclear bombs detonating at the same time. This would create mass extinction on Earth, sum 99.8%.
Hours per week:
Advice for students:
To pass this course you definitely need to spend the time studying the course material. I purchased a telescope from Amazon.com that I used in my back yard to visually study the stars first hand. This helped me understand the teachings better about luminosity, distance, and the sizes of the stars.