Hi! I was in Blacker, too (same year as Andy). I matriculated wanting to do astro and stuck with it, but there were enough excited CS majors around (of which Andy, of course, was one) that I ended up taking a number of CS classes for fun before graduating.

And thank goodness I did! I eventually left astro for industry and that experience (both the formal classes and just being around a bunch of CS people a lot) helped with that transition tremendously.