Are planetary scientists rare in astrophysics departments?

[Simfish]

I really love planetary sciences, especially the science concerning the moons of the gas giants (although lots of this research is constrained by the availability of space probes). But are planetary scientists rare in astrophysics departments? In my university, almost all of them are in the Earth and space sciences department, which has different admissions criteria from the astrophysics department here. I could possibly apply to both astrophysics departments and planetary science departments in the same university, but I'm not sure if this is allowed (I almost certainly have a higher chance of getting into an astrophysics department, although planetary science actually excites me more).

 

[tiny-tim]

When I'm a professor, I'll surround myself with my own planetary scientists.

I'll call them Rocky I II III IV and V, etc …

and I won't have any with rings or spots. ​