I actually have looked in the University of Washington astrobiology Ph.D. program and saw that it was a dual Ph.D. program, which seems to be common in the US for astrobiology graduate school programs. I know outside the US the University of Edinburgh has the UK Centre for Astrobiology and also a graduate program that specifically seems to only specialize in astrobiology for a Ph.D. with room to specialize within it through research. Within the duel program at UW I could also get a Ph.D. in biology or microbiology in addition to the Ph.D. in astrobiology, so I wonder what would be more useful or applicable to the work I would do within the field of Astrobiology; a Ph.D. in astronomy or a Ph.D. in biology/microbiology? Specifically, I want to do field work and field research within astrobiology, which I am beginning to think occurs within biology more than astronomy/astrophysics (these are all questions I am wondering that are helpful for me deciding what to major/minor in for undergrad).
As for research experience, I only just completed my first year of college, so no I do not currently have an internship yet, and am spending this summer working and taking a college course to help with what is required for my college. But I hope to have an internship next summer in addition to doing research work with a professor during my upcoming sophomore year. In high school, I did two years of internships one of which was with LIGO and I conducted research with them, but I want to expand to have more experience in my college career as well.