I'm planning to start grad school for astrophysics next year, but am kind of put off by reading about the lack of jobs in science after graduation. It looks like data science is the current hot field to go into, even for PhDs in other fields. Would it make sense to start a PhD program fully planning on taking the data analysis skills you learn and running with them after graduating? Would it be that hard to learn the additional necessary skills on the side as I go? I'm planning on going into astro because it really is something where I feel like my life would be incomplete if I didn't do it. I'd like to learn the data analysis skills working on something I already know I love.