Original sentence: Cosmology (from Greek  - , kosmos, "universe"; and , -logia, "study"), in strict usage, refers to the study of the Universe in its totality as it now is (or at least as it can be observed now), and by extension, humanity's place in it
Edited sentence: Cosmology (from Greek  - , kosmos, "universe"; and , -logia, "study"), in strict usage, refers to the study of the Universe and perceived reality in its totality as it now is (or at least as it can be observed now), and by extension, humanity's small part in it