This is a unique course out of many astrophysical MOOCs offered, since it focuses on analysis. You will be using a DS9 tool and really do X-ray spectroscopic etc. analysis of various space phenomena. That was the most fun part of the course. It also features lectures on basic cosmology and astrophysics, with a detailed course wiki. Assignments aren't difficult, but there's a lot of calculations, however easy ones, and half of them include DS9 work. Don't worry - a detailed tutorial is given as the first module, so what are you waiting for? Go and analyze the universe from beautiful images with high-tech software.