I recently finished the course
"Imagining Other Earths" at Coursera and am currently doing
"Greatest Unsolved Mysteries of the Universe" from EdX. Both involve some physics especially the second and are given by experts working in the field who are also good teachers. Neither are that easy but good advanced level Physics students should be able to cope.
The first is wide ranging with exoplanets as the main theme but including the solar system, star formation and astrobiology along the way. There are good video lectures and assignments requiring mostly writings short reports. Physics includes such things as inverse square law and Stephan's Law.
The second is more focused on astrophysics and cosmology with more short but good lectures and many short questions and assignments requiring calculations or estimation. More work.
Both have proved very worthwhile and a great learning experience. Recommended.
