I’m quite envious of your situation right now. I wish I was that smart in mathematics. And you have a creative itch in you too. You could probably work part time in NASA, Apple and Pixar after you finish all these degrees.
I have a dear friend since elementary who at age 9 would draw jet fighters and submarines by hand and make them exactly as they look in books and magazines. In choosing which college course to take, he struggled between filmaking and architecture. He took architecture and was praised and scolded at the same time when he submitted a church design with the structure standing on an asteroid!
He is a successful architect now but longs to enter the field of filmaking. When I asked him what’s stopping him. Family, he said.
Bottomline, if you finish a degree in Computer Engineering, you would find a well paying job and if other things do not happen in your life yet like having a family, you could finance your Astrophysics study and then work for a company that may need both your expertise.
Depending on the available time you still have then, you could self-study in animation. If you are that smart and you have artistic gifts, I don’t think you really need to go to a school for that. Think animation education software. Later on, you could get a job maybe in an animation company or video game company that would require you’re now amazing set of skills.