Astronomy grads have limited job opportunities---
Teaching in secondary schools and college classes for non-science majors, first year astrophysics.
Planetarium operation and show production.
Interviews with TV science show directors
Assist astrophysics researchers at observatories
Space station or other space travel operations
Astrophysicists do research at major universities and observatories, teaching advanced courses at colleges and universities.
Planetary geologists do the same, also at JPL and NASA.
My Internet friend from 20 years ago got advanced degrees in planetary geology, researches asteroids, works with space cameras on probes, and does work at major institutions and observatories.