I sort of see philosophy as standing by itself in comparison to the other two subjects in question. I've found physics and cosmology to be inextricably linked in many ways. I was wondering if anybody had a recommendation regarding what to study first (even though I've technically already studied basic physics: mechanics, heat, sound, electricity and electonics, and a little chemistry, if that counts for anything). And also, are there any prerequisite courses I should take before physics/cosmology/philosophy? I know I'm going to need to touch up on my math which isn't currently top-notch... specifics would be greatly appreciated. Here's a list of subjects I'm taking next semester: Psychology General science (biology, astronomy, and mainly more physics) Music History Economics Algebra 1 I'm doing this cosmology/philosophy/physics thing as extra studying on my part. I'm home-schooled, so I'm not affiliated with public schooling. My studying course doesn't have cosmology and philosophy, so I'm kind of at a loss. Anyway, what's your recommendation?