I'm a Clojure fan but I'm not sure a modeling and simulation problem such as this is the best use case for it. Sure, you can do it, but it probably wouldn't be my first choice. Last I checked, Aerospace software is still dominated by C/C++ and Ada (still alive because it found itself a niche), and there's good reasons for it. The satellite simulators I worked on had to be able to execute actual flight code from the vehicle, so you needed to get fairly low level.

Nowadays I write web applications like everyone else on the planet and use Java, JS and/or Clojure (when I can get away with it).

But cool little project, nonetheless.