@magnetite well i really love bio and geo, and paleontology didn't really feel quite right for me or at least not in the traditional sense, and i've always been incredibly interested in space and the potential for life outside of earth. so when i was looking around at grad schools and searching for POIs last semester, i stumbled across some astrobiology programs and realized that was what i want to do! i don't have any specific ideas in mind for what i want to work on, but so far i'm interested in geomicrobiology and geochem so basically microbial stuff. i learned a little bit about europa and enceladus last semester in my astronomy class, they're so interesting! i definitely think there's a lot of potential there for life near the hydrothermal vents.
also, re: having sort of unclear/broad interests, the POIs i've talked to said that's good! at least in their opinions. i think in astrobiology in particular, they're looking for creative thinkers who want to incorporate information from a bunch of different fields, 'cause there's so much we don't know about other planets so honestly anything is informative.
@Yunix i'm hoping to work with frank corsetti, if i'm accepted! have you worked with him before or taken any classes he's taught?