This might be of interest here. It's a free, online course from Princeton called Imagining Other Earths.
Follow the link for more details, including the syllabus, texts, and recommended links.
Imagining Other Earths
Are we alone? This course introduces core concepts in astronomy, biology, and planetary science that enable the student to speculate scientifically about this profound question and invent their own solar systems.
Follow the link for more details, including the syllabus, texts, and recommended links.